Okay, so you can tell by the title of this blog post I'm a biologist and not a chemist. (Chemistry teachers, please don't send me hate mail!) Honestly, I don't love chemistry and I don't love teaching it. BUT, I realize how important it is for students to understand biochemistry before I dive into a fun enzyme lab. There have been years where I thought "screw it, I'm just going to talk about macromolecules and cells without reviewing atoms and bonding." Oh was I sorry. Most of my students didn't have a strong enough chemistry background to understand polarity without reviewing bonds. Although most of my students took chem-phys the previous year, they didn't understand how the chemistry they learned prior could apply to biology. So my advice is to take it slow, review the periodic table and bonding, have them build models, and really understand the structure of the 4 macromolecules before moving on in your cells unit. Once you get to membranes, they will understand them so much easier if they understand lipids. Once you get to DNA structure they will understand why it runs from 5' to 3' if they understand the structure of a nucleotide. They will also understand DNA replication and the enzymes involved so much better if they understand protein structure and folding. Have I convinced you yet? I hope so. Here are a list of fun ways to teach macromolecules and deepen student understanding:
1. Build Atomic Models. I'm lucky enough that I have access to model kits. I have my students build models of all the macromolecules. The best is when they can each build an amino acid, link them together, and see dehydration synthesis with their own eyes. Check with the chemistry teacher on your campus and see if they have kits you can borrow for a few days.
2. Emphasize Protein Folding. Lets be honest- of the 4 macromolecules, proteins are the rock star. It's so important that students understand how and why proteins fold, and the consequences of them denaturing. My school purchased a kit called "protein toobers" where students pretend the "toober" is a long chain of amino acids. (The activity can be purchased HERE. I am not affiliated in any way with this company). Students add thumbtacks (side chains) and then have to fold accordingly. For example, if white thumbtacks are hydrophilic and yellow thumbtacks are hydrophobic then they need to fold the toober so the white thumbtacks face out and the yellow thumbtacks face in. It is fun for them to see that each group's protein is folded differently based on the order they placed the thumbtacks. If you aren't able to purchase this kit, I think it could easily be replicated with pipe cleaners and pony beads (click here to check out a similar product from Science with Mrs. Lau!)
3. Use Videos. It is always helpful for students to hear things explained more than once and in a variety of ways. Find videos that will help reinforce concepts already taught. Amoeba Sisters always have great videos and worksheets that go with them. Here is a link to the video on biomolecules and the associated worksheet.
4. Engage with Labs! There are a bunch of fun labs out there on macromolecules, especially enzymes. I love this liver enzyme lab from biology corner. Students will see how changing temperature and pH will affect enzyme reaction rates. It's not the most fun lab to clean up after, but it's inexpensive and fun for the students. You can buy a tub of chicken liver from the grocery store for less than $2 and that will last you the entire day. Tip: I've found I get the best results when I puree the liver in the blender instead of just cutting it into pieces.
5. Use Review Activities and Games. I have never met a student that didn't love puzzles and games. It is way more fun to use these as formative assessment tools opposed to a study guide. I have a few available in my teachers pay teachers store I think you will enjoy! One is a macromolecules tarsia puzzle (pictured) where students have to pair up words with their definitions. Another option is a memory game where students flip over 2 cards at a time to try and find matches. I also have a flip book which is a fun review tool for interactive notebooks. Don't miss my macromolecules bundle where you can buy them all at a discounted price!
What other fun ways do you teach macromolecules? Leave them in the comments!
If you've been teaching for a while, chances are you have had some ELL (English language learner) students in your classroom. I've known many teachers that have panicked and asked me "how can I teach them science if they don't speak English?" I think many teachers tend to think they need to dumb down the content for these students. They aren’t dumb! Your job is to make the content accessible. It’s been my experience that ELL students are amazingly hard workers and are a blast to work with. My friend Bethany Lau over at Science with Mrs. Lau and I have created a list of best-practice tips for working with ELL students. We also have some helpful resources to share with you!
Tip #1: Get them talking! A quiet classroom is not conducive to learning a new language. Many students are scared to speak out loud in English, especially in front of the entire class. To help build their confidence, try small group discussions first. To ensure that every student has spoken to his or her group, give each student something color-coded (I use colored Popsicle sticks from the dollar store). When a student speaks, they place their Popsicle stick in the center of the table. It is easy as a teacher to walk around and monitor who is speaking and who isn’t. Make it a requirement that each student has to speak at least twice during group discussions.
Tip #2: SLOW down when you are talking, and use nonverbal cues. This is much easier to do when you have all your ELL students together in one class, but when they are mixed with native English speakers we often don’t realize how fast we are talking. It is really difficult for ELL students to process when you are speaking a mile a minute. So take a deep breath, slow down, and use your hands and other nonverbal gestures. Don’t be afraid to act things out! Yes they will giggle, and yes they will love it.
Tip #3: Build vocabulary. When you teach new words, always make your students repeat the word out loud after you say it. And if they aren’t loud, make them do it again. If you have a word wall in your classroom, go down the list frequently and make your students say them with you. To help students remember the definitions, discuss prefixes and suffixes to help them decode meanings.
Find fun ways for students to practice those new words. Instead of doing vocabulary worksheets, do vocabulary games instead! Bingo is an awesome way to review vocabulary words before a test. Create a bingo card from a free online bingo-card maker such as http://osric.com/bingo-card-generator/. Type in the words you want your students to learn and print a class set. Instead of calling out the words, say the definition and the students need to cover up the correct word. If they get a bingo they need to say the words out loud in order to win a prize.
Tip #4: Utilize pictures. I used to try and translate parts of my power points into Spanish before the lesson thinking I was doing my students a favor. I quickly realized that:
a. Google translate is frequently wrong,
b. many of my students can speak fluent Spanish but can’t read it,
c. and even if they could read most of it, they didn’t know the content specific terms in Spanish. Why would I want my students to learn the word “homeostasis” in Spanish AND English? Let’s just stick with English.
Instead of translating, stick with visual pictures. Pictures transcend all languages. Include them as much as possible in your lessons and power points. Make students draw pictures in their notes. Include pictures in all your articles you want students to read. A great pre-reading activity is to have students look at the pictures and captions in an article before they read the body paragraphs. Have them guess what the article is about based on the pictures and discuss with their neighbors (get those Popsicle sticks back out). If you have a word wall in your classroom, make sure it includes pictures too! The more they see a picture associated with a new word, the more likely they will remember what it means.
Tip #5: Learn about their language and culture, and include it in your lessons when applicable. Students will have more buy-in to your lessons when they feel like their language and culture is valued. If you can connect their language to the content, chances are they will remember it better. For example, students use the term “liga” in Spanish to mean rubber band or hair elastic. When teaching “ligaments,” discuss how they are stretchy unlike tendons. Students won’t forget!
Tip #6: Use Manipulatives! Sometimes students need help learning how to structure their writing into logical paragraphs (even native English speakers need this too!) If you have sample paragraphs for them to learn from, you can print separate sentences out on separate lines, and cut them into strips. Then you can mix the sentences up and have students order them in how they should logically appear in a sentence! You can also do this for other parts of a lab report, like the procedure section or even the proper labels for a graph!
You could create your own writing structure manipulatives, or you can check out Bethany Lau’s Lab Report Writing Activity Bundle found here. She has a set of activities with manipulative for each and every part of the lab report with a lot of examples for students to learn from.
Tip #7: Get them writing as much as possible. Data shows that when students take the state language proficiency tests, they struggle the most with writing. Find ways to get students writing on a daily basis. This could work in many different formats- just find one that works for you. Daily bellwork is a great place to start, as well as having students keep writing journals. What should you have them write about? Check out these writing prompts from Science Rocks’ store! These were designed to be used before new concepts are taught, and allows the teacher to assess prior knowledge and check for misconceptions. When students are first learning English, allow them to write in their native language and plug in English words that they know. Throughout the year as their language improves you will see their writing transform from fragmented to fluid sentences.
Another great writing strategy for ELL students are sentence frames. For students still learning how to write a complete sentence, give them half the sentence first and have them fill in the blanks. For example, a hypothesis on a lab report for an ELL student could look like this: “If I change ___________, then I think ___________ will happen, because __________.”
Tip #8: Model. And then model some more. As science teachers we tend to think of “modeling” as meaning “I’ll show them how to do a lab before it’s their turn.” Modeling applies to so much more than labs.
a. Model reading strategies. As you read through articles out loud, stop and discuss. What was the main idea? What did you highlight and why?
b. Model writing strategies. When you assign those writing prompts, work through one with them first. Show them what a quality answer would look like.
c. Model behaviors. Many students will enter your classroom from different backgrounds. Behaviors that may have been acceptable where they grew up may not be acceptable in your classroom. If you want them to give a verbal presentation with eye contact, show them what a good presentation looks like first.
d. Model word pronunciation. Sometimes if students are nervous to say things in English, I have them teach me how to say the phrase in their native language first. Once they have giggled at my horrible pronunciation, they aren’t so embarrassed to pronounce things in English.
Tip #9: Modify. Yes, one more thing to add to your to-do list. But it can honestly be as simple as cutting down the number of questions for them to complete, or adding pictures to an assessment. One of my favorite websites to find nonfiction science articles on is newsela.com. Not only is it free to use, but once you find an article you can change the lexile! That means all your students can be reading the same article but at a reading level that is accessible to them.
Tip #10: Use formative assessment frequently, and celebrate gains. It’s important to check in with ELL students often. Many of them will take notes, smile, and nod during class, but only understood 20% of what was discussed. Exit tickets and note summaries are great ways to check in and see where they need help and what they have mastered. Make your exit tickets specific. Don’t just say, “One thing I still need help with is…” but instead ask them to answer a specific question related to the lesson. This will help you group them by mastery and focus on the students that really need your help. Once they have mastered a new concept or learned new vocabulary, don’t forget to celebrate! Let them know you are proud of them, and they will work harder in the future. If students feel like their hard work is recognized and celebrated, they will continue to work hard!
We’d love to hear stories from you about what helps your ELL students! Let us know in the comments!
Density can be such a fun concept to teach! There are so many lab options to choose from. My recommendation: do a minimum of two density labs. Introduce one lab BEFORE you teach what density is, and allow students to discuss why some objects sink, why some float, and how mass and volume are related. Then AFTER you teach what density is and how to calculate it, introduce another lab where students can actually measure the density of objects. I have a bunch of density labs available in my TpT store. Read through the descriptions and see which ones suit your fancy!
BEFORE you teach density lab options:
1. Density Column Lab- this lab is always a winner! Have students layer different liquids in a graduated cylinder and have them figure out why the liquids form layers and don't mix. You can also add objects to the cylinder and see which layer they settle in. Here is a video of this lab from Steve Spangler's sick science series.
2. Dancing Raisins Lab- Another fun hands on lab. Students will try and figure out why raisins "dance" (rise and fall) in a beaker of soda as the carbonated bubbles stick to the raisins.
3. Volume vs. Mass Lab- This lab is great for reinforcing measurement and graphing skills. It is similar to the density of water lab (listed below) but doesn't discuss density yet. Students will measure the mass of water in 10mL increments and graph their data. They will find out the density of water based on their best fit line.
AFTER you teach density lab options:
4. Density of Water Lab- Once students know the formula for density, have them figure out the density of water with this easy lab. Students will calculate the density of water at different volumes and learn that the density of water will always be 1 g/mL.
5. Density of Oil and Water Lab- I wrote this lab shortly after the BP oil spill in 2010. I love that students are able to relate density to a real world situation and discuss oil spills and clean up methods. In this lab students will observe how oil and water react when mixed and try different methods of absorbing the oil from their beaker.
6. Sink or Float Lab- In this lab, students will keep adding salt to a beaker of water and measure how much salt it takes to make a baby carrot float. Once they get the carrot to float, they will need to calculate the density of the salt-water solution. Don't forget to show students a picture of the Dead Sea!
And an extra freebie!
7. I used this colorful convection lab when I taught about heat transfer, but it also demonstrates density! You could easily adapt it to your density unit. Download it here for free!
It's that time again! Last year we had a huge secondary science giveaway where we gave away 4 $100 TpT gift cards and resources to our store. This year it's even better! We are giving away 5 $100 TpT gift cards and a ton of resources! TpT has everything you need to have an awesome low-stress year. We would love to help you pay for those resources! Keep reading to learn how!
There are 2 ways to win:
1. Individual giveaways: Each seller pictured above is giving away individual prizes on their blogs! Check out the bottom of this post for a chance to win $25 worth of resources to my TpT store! There are multiple ways to win, so be sure to check out the rafflecopter below.
2. Group giveaway- We put together one HUGE blog hop giveaway, just for science teachers teaching in grades 6-12: 5 $100 Teachers Pay Teachers gift cards! Each blog post has a secret code word and number. My clue word is 17. right. The number tells you where the word falls in the secret sentence. Collect the words from each blog, write them down in number order, and copy the secret sentence into the joint rafflecopter giveaway. This rafflecopter form is the same on every blog, so you only need to enter once from any one of our blogs!
Giveaway starts Monday at 12 noon EST and ends at midnight on Friday. Best of luck!
Congrats! You've completed the blog loop! CLICK HERE to head back to Mrs. Lau's science site.
The fine print: “Giveaway ends August 11th, 2017 at 11:59 PM EST. Winners will be selected at random and be notified by email. Winners have 48 hours to confirm their email addresses and respond before a new winner is selected. The product offered for the giveaway is free of charge, no purchase necessary. My opinions are my own and were not influenced by any form of compensation. Facebook, Twitter, Pinterest, and Instagram are in no way associated with this giveaway. By providing your information in this form, you are providing your information to me and me alone. I do not share or sell information and will use any information only for the purpose of contacting the winner.”
I posted a picture of my latest bulletin board on facebook and instagram and got a lot of positive feedback. Many people reached out asking for a copy to make their own, so I've uploaded it for FREE to my TpT store! I've included 2 versions: a non-editable PDF that is ready to print-and-go, and an editable powerpoint version in case you want to change up any of the scientists or quotes. Enjoy!
CLICK HERE to head to my TpT store and download them for free!
Are you tired of hearing the following questions 10 times a day:
"What did we do yesterday?"
"Was there homework?"
"I lost my paper. Can I have a new one?"
"What are we doing today? Anything FUN?"
"Where do I turn this in?
I know I was. Want to save your sanity? I cannot express to you how important it is to establish routines in your classroom. If you train students the first couple of weeks you will be so grateful later. I've established routines so my students know exactly what to do when they enter the classroom, know where to get missing work, and see what we are doing that day. After a couple of weeks if a student comes up to me and says "where is the worksheet from yesterday?" other students almost instantaneously respond so I don't have to deal with it. Here are a couple of the things I have done in my classroom to save my sanity:
1. As soon as students walk into my classroom, they automatically grab whatever worksheet is in the basket by the door. The first week or two I have to stand by the door and remind them, but after that it is just habit for them to reach over and grab the worksheet. It saves me time later so I don't have to pass out the notes, bellwork form, or worksheet for that day. It is also really nice when you have a sub, because it is one less paper they have to worry about.
2. I was so crazy tired of hearing "What are we doing today? Are we going to do anything FUN?" (Really? Science is always fun). Anyway, I had my sister who has a cricut machine cut out these vinyl letters for my whiteboard. As soon as students come into the classroom they know to get out their bellwork form, write down the daily objective and homework, and have 5 minutes to complete the bellwork on the board. Those 5 minutes are time for me to take attendance, check any urgent emails, and often get lab supplies ready for the next period. In my class students pick up a bellwork form (by the door!) every Monday and turn it in every Friday. So if a student ever says "what are we doing today?" all you have to do is point to the board.
3. If you had students that were absent the day before, do they know where to get their missing assignment? (Hint: The answer should NOT be they have to come bother you to get it). I have a crate in the back of the room for all extra worksheets. There are 5 file folders in the crate, labeled Monday - Friday. If a student was absent on a Tuesday, they know to go to the Tuesday folder and grab whatever papers are in there. Also, if a student wasn't absent but lost an assignment in the depths of their backpack, they know they can find extras in the orange crate.
4. Do your students know where to turn in papers? Whether you use small trays or file folders like I do, it is nice if students know exactly where to turn in papers. I have another milk crate at the front of the room that has file folders labeled with each period of the day. I also have a folder in the very back for no-names, so if students have a missing assignment they know they turned in, they can check the no-name folder. (FYI: Walmart carries these milk crates for very cheap during back to school season!)
5. I don't personally use this last tip, but I know teachers that do and really like it. When students ask "what did we do yesterday?" I usually have them check their neighbor's bellwork form and copy down the objective. But another option is to have a calendar posted in the front of your room and jot down what you taught that day. If you laminate the calendar you can write directly on it with expo markers, but if it's not laminated you can use sticky notes instead.
Overall having set routines will get your classroom running smoother. Ever notice that in many IEP's it has routines listed as an accommodation? It is so much easier to start class when students know exactly what to do. Any other tips you want to share? Leave them in the comments!
Cladograms are my favorite part of the classification and taxonomy unit. They are relatively simple for students to grasp and are great for visual learners. While they can be easy to read, sometimes students struggle once you ask them to make their own.
Enter: the ultimate teacher engagement tool. Candy.
In this activity, students will be given a ziplock baggie with 4 types of candy inside. On the front of the worksheet students will be given the traits to analyze and then are asked to complete the cladogram. On the back of the worksheet students need to use the same candies but analyze them using different traits. Once they finish their cladograms they are free to eat!
TIP: As I've used this activity over the past few years, I've found students sometimes struggle with the back side of the worksheet where they have to make their own cladogram. One line of questioning that really helps them organize their thoughts is this:
"What is a trait all 4 candies have in common? What is a trait only 3 of them have in common? What is a trait that 2 of those 3 remaining candies have in common? What is a trait that only 1 of the remaining candies has?" Once they think of it that way it is much easier to fill out the chart and complete the cladogram.
I've made this lab worksheet completely editable so you are free to change the candy types based on what you can find on sale at the store. Don't feel forced to use the candies I have listed! Keep in mind, if you change the candy types you will likely have to change the traits students are looking for on the front side of the worksheet.
I hope you enjoy this activity! Want another classification lab activity? Check out this blog post where students use preserved specimen jars to classify organisms.
Living? Nonliving? Dormant? Dead? Even though teaching living vs. nonliving seems very elementary, you'd be surprised by how often high school students get confused when you throw examples at them. It makes me think of this 90's "J-E-L-L-O it's alive!" commercial:
But in all seriousness....
Teaching characteristics of life is a great way to start off the year in biology. I like teaching it week 1 because it's more fun than the scientific method (which they should know by now anyway) and a great introduction to biology- the study of living things. Here are a few resources you can add to your teacher toolkit for your life unit:
Why I don't teach lab safety the first week of school... and other back to school science teacher tips
It's almost time for me to start planning out my first week of school (yes it's crazy, I go back end of July). When I first started teaching, I spent the first week reviewing the syllabus, class rules, and (duh duh duh duhhhhh) spent time reviewing all the lab safety procedures. It just felt like the responsible science teacher thing to do. What I soon realized is the students were just plain bored... or nervous about finding their next class.... or thinking about who has the same lunch period as them... but they were NOT memorizing all those nice lab safety rules I was so carefully explaining. They are also reviewing rules in almost every other class and the chances of them remembering what you said those first few days are slim. So I decided to throw the "let's front-load all the rules that they will forget anyway" out the window and find more exciting activities for that first week.
I know some of you science teachers reading this are thinking "But I have to review rules the first week, because they need to sign a lab safety contract!" Yes, they do. (And if you don't have one handy, I recommend Flinn Science's contracts which you can download free here.) But is it really necessary the first few days? Here is my main argument on why you are wasting your time: Why are you teaching students to wear goggles and keep scalpels pointed down during dissections if you aren't actually getting to the dissection until April? Or why are you teaching them the proper way to carry and store a microscope when the microscopes don't come out of the cupboard until your cells unit in December? Students will just forget, and you will have to review the rules all over again anyway. Instead, wait until you get to the lab and then review the necessary rules. As far as the contract goes, have students read through it during class or at home with a parent and sign it. If they have any questions feel free to discuss them, but don't waste too much time on it. Here are a few ideas to do instead:
As much as we would love to have our lessons end 30 seconds before the bell rings, it rarely happens. Even if it does work out perfectly in 1st hour, 2nd hour is a completely different group of students and the lesson might require more or less time. It sometimes happens that the lesson is over and I still have 5 minutes left of class. It drives me crazy when students try and wait by the door! If you are a science teacher, here is a great idea to fill those last 5 minutes.
There is a show on science channel called Outrageous Acts of Science. During the show they show video clips and have scientists explain the science behind the video. The videos are all about 2 minutes long and fun for students to watch. Go to youtube.com and type in "Outrageous Acts of Science" in the search bar. You will get a ton of results. Pick out a few that are interesting. Then, head over to keepvid.com and copy the youtube URL into the keepvid site. I like this website because it allows you to download youtube videos and save them to your computer. That way you don't have to worry about commercials or streaming/buffering issues.
Another fun youtube channel is from Steve Spangler and is called "Sick Science." Click here to view the youtube channel. It shows simple science experiments and allows the students to brainstorm why they happened. It is great to have students discuss why they think something is happening and not just have it explained to them.
If you have some of these videos already picked out and ready to go, it will save you time later. I think you will find these clips are way more valuable than the students trying to sit on their phones or wait by the door. Any other ideas you use for those last 5 minutes? Drop them in the comments!
Becca of Science Rocks
Hi, I'm Becca! I've been teaching science for 10 years at both the middle and high school levels.