Reproduction and Offspring Diversity Activity: 8 Hands-On Stations for Teaching Sexual and Asexual Reproduction (TEKS 7.13C)

Chris Kesler · 8 min read

Tell a 7th grader that one starfish, cut in half, becomes two starfish. They don't believe you. Tell them a hydra grows a tiny copy of itself out of its own body and that copy walks off to live as its own animal. Now they're paying attention. Tell them a single mushroom can spread across an entire forest by releasing spores into the wind and you'll get the question every science teacher waits for: "Wait, is that real?"

Reproduction is one of the few topics in 7th grade biology where the natural world is genuinely weirder than what kids assume. They start the unit thinking reproduction means "two parents make a baby." That's it. The idea that an organism could clone itself by splitting in half, budding off a copy, breaking into pieces, or shooting spores into the air feels like science fiction to them. The job of this lab is to show them it's not.

The Reproduction and Offspring Diversity Station Lab for TEKS 7.13C closes that gap in one to two class periods. Kids model five generations of asexual and sexual reproduction with pennies, study fragmentation in the crown of thorns starfish, budding in hydra, fission in paramecium, and spore formation in mushrooms, and figure out which strategy works best in stable versus changing environments. By the end, they can tell you the trade-off: asexual reproduction is fast but the offspring are identical, sexual reproduction is slow but produces variety.

⏱ 1–2 class periods 📓 7th Grade Science 🧪 TEKS 7.13C 🎯 Built-in differentiation 💻 Print or Digital

8 hands-on stations for teaching reproduction and offspring diversity

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 the penny generations, and break misconceptions while kids work through the rotation.

The Reproduction and Offspring Diversity Station Lab has four input stations (where students take in new info on sexual reproduction, asexual reproduction, gametes, traits, and the four types of asexual reproduction) 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 reproduction and offspring diversity

🎬 Watch It! —

A short YouTube video introduces sexual versus asexual reproduction. Students answer three questions: the difference between sexual and asexual reproduction, what budding is, and which type of reproduction results in variety. Visual kids come alive at this station before they ever pick up a penny.

📖 Read It! —

A one-page passage called "Reproduction and Survival" walks students through sexual reproduction (gametes from two parents combining to make unique offspring with traits from both), asexual reproduction (offspring from one parent through budding, fragmentation, fission, or spore formation), and the trade-offs of each strategy. Sexual = good for changing environments. Asexual = good for stable environments. Three multiple-choice questions follow plus five vocabulary words to define. Comes in two reading levels (Dependent and Modified) plus a Spanish version.

🔬 Explore It! —

This is the heart of the lab. Students model five generations of reproduction with pennies. Part 1 (Asexual): start with one penny on heads. Each generation, the organism produces two offspring, all on heads, identical to the parent. After five generations they have a pyramid of identical pennies. Part 2 (Sexual): start with two pennies, one heads and one tails (different traits from two parents). Each generation flips a coin to determine the offspring's trait, then the offspring finds a mate with the opposite trait. After five generations they have a much smaller, much more varied pattern. They reference diagrams of asexual reproduction in paramecium and sexual reproduction in animals. Five reflection questions wrap it up.

💻 Research It! —

Students examine 10 reference cards covering the four types of asexual reproduction with a real-world organism for each: fragmentation in the crown of thorns starfish (cut it in half and you get two starfish), budding in hydra (a copy grows out of the parent stalk and detaches), fission in paramecium (literally splits into two), and spore formation in mushrooms (releases spores into the air that grow into new mushrooms). Four questions follow, including the killer one about why capturing and cutting the invasive crown of thorns starfish in half does NOT work for getting rid of them.

📷 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 10 cards into Asexual Reproduction (one parent, budding/fission/spore formation, identical offspring, suited for stable environments, no variety) versus Sexual Reproduction (two parents, gametes, unique offspring, suited for changing environments, more variety). Easy to spot-check at a glance.

🎨 Illustrate It! —

Students sketch one of the four ways asexual organisms reproduce, including a picture of the organism, how it reproduces, and appropriate labels. They pick fragmentation, budding, fission, or spore formation. Even kids who say "I can't draw" surprise themselves here. The drawing locks in the visual difference between a hydra growing a bud and a paramecium splitting in half.

✍️ Write It! —

Three open-ended questions: the main differences between sexual and asexual reproduction, how the way an organism reproduces affects the variety of the species, and a scenario question asking whether they would benefit more from sexual or asexual reproduction if they lived in a stable hot spring environment. The third question is the killer. It forces kids to apply the trade-off they learned to a specific environment.

📝 Assess It! —

Three multiple-choice questions plus a fill-in-the-paragraph that uses all five Read It! vocabulary words (sexual reproduction, asexual reproduction, gametes, offspring, traits). The paragraph reads: "Living organisms on Earth can reproduce to create ___ two different ways. One way is ___, where organisms use special cells called ___ to reproduce. The offspring get ___ or characteristics from both parents..." 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 an acrostic poem using "sexual reproduction" or "asexual reproduction," design a comic strip showing an organism reproducing asexually frame by frame, build a Venn Diagram comparing sexual and asexual reproduction including advantages and disadvantages, or design a 10-question quiz for classmates with multiple choice and short answer. Requires teacher approval before they start.

How this fits into a complete reproduction unit

This Station Lab is the Explore day of our full Reproduction and Offspring Diversity Complete 5E Lesson for TEKS 7.13C. The complete two-week unit follows the 5E method of instruction and includes an Engage hook, the Reproduction and Offspring Diversity 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 sexual versus asexual reproduction, the Station Lab on its own does the job.

Two options

Reproduction and Offspring Diversity 5E Lesson cover

Full 5E Lesson $13.20 Get the 5E Lesson

Reproduction and Offspring Diversity Station Lab cover

Just the Station Lab $7.20 Get the Station Lab

Materials needed to teach reproduction and offspring diversity

Materials beyond what's in the download:

Pennies (or any two-sided coins): about 30 pennies per group rotation. The Explore It! activity needs enough to model five generations of both asexual and sexual reproduction.
Index cards for the Challenge It! quiz extension.
Colored pencils or markers for the Illustrate It! station.
Pencils and the printed answer sheets (included)
A device with internet for the Watch It! station

Standard covered: Texas TEKS 7.13C —

Compare sexual and asexual reproduction and describe how the type of reproduction influences offspring's diversity. Supporting Standard.

See the full standard breakdown →

Grade level: 7th grade life science

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

Common student misconceptions this lab fixes

"All organisms need two parents to reproduce."
Most kids walk in thinking reproduction always involves two parents because that's how humans, dogs, cats, and the animals they see in their day-to-day lives all reproduce. The Research It! cards break this with four real organisms doing the opposite: a starfish that becomes two starfish when cut in half, a hydra that grows a tiny copy of itself out of its body, a paramecium that splits down the middle, and a mushroom that releases spores into the air. The Explore It! penny model in Part 1 shows exactly how fast asexual reproduction can grow a population (one organism becomes 32 in just five generations) without ever needing a partner. Once they see the four mechanisms in action, the "two parents always" rule snaps.
"Sexual reproduction is always better than asexual reproduction."
Kids assume sexual reproduction must be "better" because it's the kind that humans use. The Read It! passage names the trade-off directly: sexual reproduction creates variety which helps a species adapt to changing environments, but it's slow and requires two parents. Asexual reproduction is fast and only needs one parent, but the offspring are identical so the species can't adapt to change. The Write It! "stable hot spring environment" question forces kids to apply the trade-off in reverse: asexual is actually better in a stable environment because the parent is already well-suited to survival. The Organize It! card sort drives it home with "suited for stable environments" → asexual and "suited for changing environments" → sexual.
"Budding, fragmentation, and fission are all the same process."
Kids hear all three words in the same minute of class and start blending them together. The Research It! cards split the four types of asexual reproduction with a different organism for each so the differences stick. Budding (hydra) means a copy grows out of the parent and then detaches. Fragmentation (crown of thorns starfish) means the parent breaks into pieces and each piece becomes a new organism. Fission (paramecium) means the parent splits down the middle into two equal halves. Spore formation (mushroom) means the parent releases spores into the air that grow into new organisms somewhere else. The Illustrate It! station forces kids to pick one and draw it accurately, which is the moment the four processes stop being interchangeable in their head.

What you get with this reproduction and offspring diversity 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 (fragmentation in starfish, budding in hydra, fission in paramecium, spore formation in mushrooms)
Sort cards for the Organize It! station (10 cards comparing asexual and sexual reproduction)
Penny model diagrams for the Explore It! activity (asexual reproduction in paramecium, sexual reproduction in animals)
Student answer sheets for each level

No login required. Download once, use forever. Reprint as many times as you want.

Tips for teaching reproduction and offspring diversity in your 7th grade classroom

Two things make this lab go smoother the first time:

1. Pre-count pennies into a small bag for each group.

If kids have to dig through a piggy bank for pennies, you lose 5 minutes per group at the Explore It! station. Pre-count 30 pennies into a sandwich bag and drop one bag at the station per rotation. The Part 1 (asexual) modeling needs about 32 pennies (one parent doubling each generation for five generations) so 30 is the floor.

2. Save the trade-off question for whole-class discussion at the end.

The big idea of this lab is the trade-off: asexual is fast but identical, sexual is slow but varied. After every group finishes, gather them together and ask: "If a disease showed up that killed every starfish with a certain trait, which type of reproduction would help the species survive?" Some kids will say sexual (correct, because variety means at least some offspring would have a different trait that survives). Some will say asexual. The five-minute discussion locks in the trade-off in a way no worksheet question can.

Get this reproduction and offspring diversity activity

Reproduction and Offspring Diversity Station Lab for 7th grade life science (TEKS 7.13C)

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 7.13C cover?

Texas TEKS 7.13C asks 7th grade students to compare sexual and asexual reproduction and describe how the type of reproduction influences offspring's diversity. By the end, students should be able to name the four types of asexual reproduction (budding, fragmentation, fission, spore formation), explain how gametes work in sexual reproduction, and describe the trade-off between speed and genetic variety in each strategy.

What's the difference between sexual and asexual reproduction?

Sexual reproduction needs two parents and uses gametes (sperm and egg in animals) that combine to make a unique offspring with traits from both parents. Asexual reproduction needs only one parent and produces offspring that are genetically identical to the parent. Sexual reproduction is slower but creates variety. Asexual reproduction is faster but creates no variety.

How long does this reproduction activity take?

One to two class periods (45 to 110 minutes total). The Explore It! penny modeling is the longest part because students model five full generations of both asexual and sexual reproduction. Plan for two periods the first time you run a station lab. Once your class has the routine down, most groups can finish all 8 stations in one period.

Do I need to provide my own materials?

About 30 pennies per group rotation, index cards, and colored pencils. Total cost for a class of 30: under $10 if you don't already have these supplies, and most classrooms already have a coin jar somewhere. The Watch It! station also needs a device with internet.

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 penny modeling can be replaced by drag-and-drop heads/tails tiles in the digital version, or you can keep the Explore It! station as the one physical center kids rotate through.