Comparing Organisms Activity: 8 Hands-On Stations for Teaching Single-Celled vs Multicellular and Prokaryote vs Eukaryote (TEKS 6.13B)

Chris Kesler · 8 min read

Hand a 6th grader a picture of a Great Hornbill and a picture of an amoeba and ask them how the bird and the blob are similar. They will list everything obvious: "They're both alive." "They're both animals." Then ask them what's actually the same at the cell level. The room goes quiet. The hornbill is multicellular and made of trillions of eukaryotic cells. The amoeba is one single eukaryotic cell. Both have a nucleus. Both eat other organisms for energy. Different sizes, same building blocks underneath.

That is the doorway into TEKS 6.13B. The standard asks 6th grade students to compare and contrast unicellular and multicellular organisms, and prokaryotic and eukaryotic cells. Two big comparisons, three vocabulary pairs, and a 6th grader who has never thought about whether the bacteria on their hands are fundamentally different from the cells in their hands.

The Comparing Organisms Station Lab for TEKS 6.13B closes that gap in one to two class periods. Kids classify six real organisms (amoeba, Great Hornbill, bacteria, onion, eyelash viper, cyanobacteria) by single-celled or multicellular and prokaryote or eukaryote, study labeled diagrams of a bacterial cell and a eukaryotic cell side by side, sort autotroph and heterotroph picture cards, and watch a short video that compares multicellular organisms to an orchestra full of instruments. By the end, they can classify any organism on three dimensions and explain why each one matters.

⏱ 1 to 2 class periods 📓 6th Grade Science 🧪 TEKS 6.13B 🎯 Built-in differentiation 💻 Print or Digital

8 hands-on stations for teaching how to compare organisms

A station lab is a student-led activity where small groups rotate through 8 stations (plus a 9th challenge station for early finishers) at their own pace during one to two class periods. You become a facilitator instead of a lecturer. You walk around, spot-check, and break misconceptions while kids work through the rotation.

The Comparing Organisms Station Lab has four input stations (where students take in new info on single-celled vs multicellular, prokaryote vs eukaryote, and autotroph vs heterotroph) and four output stations (where they show what they learned). Here's what's at each one.

📷 Image slot 1 — add screenshot

📷 Image slot 2 — add screenshot

4 input stations: how students learn to compare organisms

🎬 Watch It! —

A short YouTube video introduces single-celled vs multicellular organisms. Three task-card questions tie it back to another name for single-celled organisms (unicellular), whether all cells of a multicellular organism are the same (no, they specialize), and why the video compares multicellular organisms to an orchestra full of instruments. Visual learners come alive at this station because they see real organisms on screen instead of just reading about them.

📖 Read It! —

A one-page passage called "Comparing Characteristics of Living Things" walks students through the three classification questions: how many cells, does the cell have a nucleus, and how does the organism get its energy. The vocabulary is bolded throughout (multicellular, prokaryote, eukaryote, autotroph, heterotroph). The passage names photosynthesis and chemosynthesis as the two ways autotrophs make energy. Three multiple-choice questions plus the vocabulary section follow. Comes in two reading levels (Dependent and Modified) plus a Spanish version.

🔬 Explore It! —

This is the heart of the lab. Students get a stack of 14 task cards with labeled images of six organisms: an amoeba diagram (with the nucleus circled), a Great Hornbill bird, a labeled bacterial cell diagram (showing flagellum, ribosomes, cell wall, plasma membrane, no nucleus), an onion cell image (cells have nucleus), an eyelash viper, and cyanobacteria (cells do not have a nucleus, each cell is its own organism). For each organism, students determine if it is single-celled or multicellular AND prokaryote or eukaryote. Question 7 closes the activity by asking whether it is always easy to tell the difference between prokaryotes and eukaryotes (no, you need a microscope and the cells look very different).

💻 Research It! —

Students examine 16 reference cards: a Paramecium caudatum image (single-celled protist), an onion cell image (multicellular), an autotroph plant doing photosynthesis, a heterotroph wolf eating prey, a labeled prokaryotic cell with ribosome, pili, genetic material, and flagellum, a labeled eukaryotic cell with mitochondria, nucleus, cytoplasm, Golgi apparatus, endoplasmic reticulum, and cell membrane, and example cards (a plant making energy via photosynthesis, a scorpion eating insects). Six questions check whether they can identify humans as multicellular, explain why multicellular is more complex, classify the plant and scorpion as autotroph or heterotroph, explain the role of the nucleus, and predict how a microscope user would distinguish a prokaryote from a eukaryote.

📷 Featured station deep-dive — add screenshot of the Explore It! task card

4 output stations: how students show what they learned

📋 Organize It! —

A two-column card sort. Kids sort 8 cards (definitions plus 6 picture cards) into Autotroph and Heterotroph columns. Autotroph gets "creates its own energy" plus a sequoia tree, green algae, and a cactus. Heterotroph gets "cannot create its own energy" plus a koala on a branch, a lioness, and a group of teenagers. The teenager photo always gets a laugh because kids realize they are heterotrophs (they don't make their own food, they eat). Easy to spot-check at a glance.

🎨 Illustrate It! —

Students sketch one organism for each of the six characteristics: single-celled, multicellular, prokaryote, eukaryote, autotroph, and heterotroph. They label each one. The instructions even tell them they can combine organisms when one organism has multiple characteristics (a tree is multicellular, eukaryotic, AND autotrophic, so one labeled drawing covers three categories). Even kids who say "I can't draw" surprise themselves here.

✍️ Write It! —

Three open-ended questions in complete sentences: identify and compare the three characteristics used to classify organisms, explain the difference between an autotroph and a heterotroph with at least two examples of each, and explain the major differences between single-celled and multicellular organisms with evidence and examples from the lab. This is the writing practice middle schoolers need and rarely get in science class.

📝 Assess It! —

Eight multiple-choice and fill-in-the-paragraph questions tied to TEKS 6.13B vocabulary (multicellular, prokaryote, eukaryote, autotroph, heterotroph). Includes which type has a nucleus (eukaryote), what eukaryotes have that prokaryotes do not (a nucleus), and which organisms are more likely to be smaller and less complex (single-celled prokaryotes). The fill-in paragraph weaves all five vocabulary words together. If you're grading the lab, this is the easiest station to grade.

Bonus Challenge It! station for early finishers

🏆 Challenge It! —

Four optional extensions: write a newspaper article introducing a brand-new organism you discovered (you assign whether it's single-celled or multicellular, prokaryote or eukaryote, and autotroph or heterotroph), write an acrostic poem on the word ORGANISM using lab vocabulary, build a 10-question quiz with answer key on classifying living things, or research a real single-celled organism and write five sentences about its three classifications. Requires teacher approval before they start.

How this fits into a complete comparing organisms unit

This Station Lab is the Explore day of our full Comparing Organisms Complete 5E Lesson for TEKS 6.13B. The complete two-week unit follows the 5E method of instruction and includes an Engage hook, the Comparing Organisms Station Lab for Explore, PowerPoint slides and interactive notebook pages for Explain, student choice projects to Elaborate, and an Evaluate assessment.

Most teachers grab the full 5E because the Station Lab lands hardest with the days around it. But if you just need a strong hands-on day on classifying organisms, the Station Lab on its own does the job.

Two options

Full 5E Lesson $13.20 Get the 5E Lesson

Just the Station Lab $7.20 Get the Station Lab

Materials needed to teach comparing organisms

Materials beyond what's in the download:

Colored pencils or markers for the Illustrate It! station so students can label and color-code their six organism sketches.
Pencils and the printed answer sheets (included)
A device with internet for the Watch It! station

Standard covered: Texas TEKS 6.13B —

Compare and contrast unicellular and multicellular organisms, and prokaryotic and eukaryotic cells. Supporting Standard.

See the full standard breakdown →

Grade level: 6th grade life science

Time: One to two class periods (45 to 110 minutes total). Plan for two periods the first time you run a station lab.

Common student misconceptions this lab fixes

"Bacteria are just very tiny animals."
Sixth graders see anything that moves and call it an animal. Bacteria are alive and they move, so kids assume they're just small versions of animals. The Explore It! station fixes this fast. Students compare a labeled bacterial cell diagram (no nucleus, simple structure, single cell) with the eukaryotic cell diagram (nucleus, mitochondria, Golgi apparatus, endoplasmic reticulum). Bacteria are prokaryotes, structurally different from animals at the cell level. The Read It! passage uses the word eukaryote when talking about plants and animals and prokaryote when talking about bacteria. The Assess It! station then asks what eukaryotes have that prokaryotes do not (a nucleus), forcing students to confront the structural difference.
"Single-celled organisms are basically dead because they're so simple."
Kids assume that simple means barely alive. The opposite is true. A single-celled organism like Paramecium caudatum has to do EVERY function of life inside one cell: eat, get energy, get rid of waste, respond to its environment, reproduce. It is incredibly busy. The Read It! passage spells this out, the Research It! Paramecium image shows the complexity, and the Watch It! video makes the orchestra analogy: a single-celled organism is one musician who has to play every instrument at once, while a multicellular organism is a full orchestra where each musician plays one part. Both make music. Different strategies.
"Plants are alive but they don't really need anything."
This is the autotroph misconception. Kids see plants standing still and assume they're passive. The Read It! and Research It! cards explicitly call plants autotrophs and explain that they create their own energy through photosynthesis. Plants need sunlight, water, and carbon dioxide just to make the energy they need to stay alive. The Organize It! card sort puts plants in the autotroph column with a green algae and a cactus, and a koala in the heterotroph column. The Write It! station then asks students to give two examples of each, forcing them to commit to a worldview where plants are active energy makers, not background scenery.

What you get with this comparing organisms activity

📷 Inside-the-product — add screenshot of Read It passage or sample answer sheet

When you buy the Station Lab, you get a single download with everything you need:

Print version at two reading levels (Dependent for on-grade, Modified for additional support) plus a Spanish Read It! passage
Digital version as PowerPoint files (works in Google Slides too) at both levels for 1:1 classrooms or Google Classroom
Teacher Directions and Answer Key for both versions, all keys included
Station task cards ready to print, laminate, and drop in baskets at each station
Reference cards for the Research It! station (Paramecium, multicellular onion cells, autotroph plant, heterotroph wolf, prokaryotic cell diagram with labels, eukaryotic cell diagram with labels)
Explore It! organism cards (amoeba diagram, Great Hornbill, bacteria cell diagram, onion cells with nucleus highlighted, eyelash viper, cyanobacteria)
Sort cards for the Organize It! station (8 autotroph and heterotroph cards with definitions and photos)
Student answer sheets for each level

Tips for teaching comparing organisms in your 6th grade classroom

Two things make this lab go smoother the first time:

1. Project the bacterial cell and eukaryotic cell diagrams side by side during your warm-up.

The Explore It! station leans hard on students recognizing that bacterial cells (no nucleus, few organelles) look fundamentally different from animal and plant cells (nucleus, many organelles). If you show the two diagrams side by side for two minutes during your warm-up, kids will recognize the difference instantly when they hit the station. Don't explain the names yet. Just let them notice the visual difference. The vocabulary lands faster when their eyes are already trained.

2. Laminate the organism task cards. They get touched a lot.

The Explore It! station has 14 task cards that every group handles every period. Paper cards get bent and torn fast. Laminate them once at the start of the year and they last forever. Bag the set so the next group can grab them quickly. Same goes for the Research It! reference cards. The cell diagrams especially are worth protecting because they are the most-studied piece of the whole lab.

Get this comparing organisms activity

Comparing Organisms Station Lab for 6th grade life science TEKS 6.13B

Buy the Station Lab - $7.20

Or if you want the full two-week experience with the Engage hook, Explain day, Elaborate extension, and Evaluate assessment all included:

Buy the full 5E Complete Lesson - $13.20

(Station Lab is included)

Frequently asked questions

What does TEKS 6.13B cover?

Texas TEKS 6.13B asks 6th grade students to compare and contrast unicellular and multicellular organisms, and prokaryotic and eukaryotic cells. Students should be able to define each pair, give a real-world example of each, and explain the structural differences (number of cells, presence of nucleus, complexity). This Station Lab also adds the autotroph vs. heterotroph dimension because most 6th-grade curriculum bundles all three classification questions together.

Is this kids' first time meeting prokaryote and eukaryote?

Yes for most 6th graders. Single-celled vs. multicellular is sometimes mentioned in earlier grades, but the formal vocabulary for prokaryote (no nucleus, simple) and eukaryote (nucleus, complex) is brand new this year. The Read It! passage introduces all five vocabulary words in bold, and the Research It! cell diagrams give them a visual anchor for each one.

How long does this comparing organisms activity take?

One to two class periods (45 to 110 minutes total). The Explore It! station has 14 task cards that take time to work through, and the Research It! cell diagrams need careful comparison, so plan for two periods the first time you run a station lab. Once your class has the rotation routine down, most groups can finish all 8 stations in one period.

Do I need a lot of supplies for this?

Almost nothing. Just colored pencils or markers for the Illustrate It! station and a device with internet for the Watch It! station. Everything else is in the download. Total cost beyond the download is essentially zero if your classroom already has colored pencils.

Can I use this in a 1:1 digital classroom?

Yes. The full digital version (PowerPoint or Google Slides) works in 1:1 classrooms and Google Classroom. The Explore It! organism task cards become clickable cards that students examine and classify in a digital chart. The Organize It! card sort works especially well digitally because students drag the autotroph and heterotroph photos into the correct columns.