Natural & Artificial Selection Lesson Plan (TEKS 7.13D): A Complete 5E Lesson for Adaptation, Selective Breeding, and Population Change

Inside the Natural & Artificial Selection 5E Lesson

The 5E instructional model walks students through five phases: Engage, Explore, Explain, Elaborate, and Evaluate. It flips the traditional lecture-first sequence on its head. Students explore a concept hands-on before you ever explain it, which means by the time you do explain it, they have something to hook the vocabulary onto.

I switched to the 5E model years ago and stopped going back. Kids retain more, ask better questions, and stop staring at me waiting to be told the answer. The Natural & Artificial Selection 5E Lesson is built on this framework from start to finish. Here's how it plays out across the five phases.

🎯 Engage

Day one is a teacher-led hands-on beak adaptation simulation where students use different "beak" tools (tweezers, chopsticks, spoons, clothespins) to pick up different "food" types (seeds, beans, rice, marshmallows) in a fixed amount of time. Following the step-by-step teacher directions, they record how much food each beak collects and graph the results.

By the end of the period, kids have a chart of beak performance on their student sheet, drawn in their own hand, and they can explain in their own words why a finch with a beak that matches its food source is more likely to survive and reproduce. Nobody has heard a vocabulary lecture yet. That's the point. They're walking into the rest of the unit with a working mental model, not a memorized definition.

What's included in the Engage:

• Teacher directions for the beak adaptation simulation
• Printable student observation sheet
• Answer key for the discussion questions
• Four learning objective slides (standard verbatim, "Explain how natural and artificial selection" highlighted, "I CAN...", and "WE WILL...")
• An illustrated Ecosystems Word Wall in English and Spanish covering the full unit vocabulary

🔬 Explore

The Natural & Artificial Selection Station Lab is the heart of the Explore phase. Students rotate through 8 stations (plus a 9th challenge station for early finishers) over one class period. The Station Lab is split into four input stations (where kids take in new information) and four output stations (where they show what they learned).

The four input stations:

• 🎬 Watch It! — Students watch a short video on Darwin's finches, peppered moths, and selective breeding, then answer guided questions.
• 📖 Read It! — A one-page reading passage at two differentiated levels, with a Spanish version included.
• 🔬 Explore It! — The hands-on selection simulation (the heart of the Station Lab) where students model multiple generations of moth populations on dark or light bark backgrounds.
• 💻 Research It! — Reference cards with examples of natural selection (finches, moths, antibiotic resistance) and artificial selection (dogs, crops, livestock).

The four output stations:

• 📋 Organize It! — A 12-card sort where students physically place examples under natural selection or artificial selection.
• 🎨 Illustrate It! — Students draw a four-generation timeline showing how a population shifts under selection pressure.
• ✍️ Write It! — Three open-ended questions in complete sentences (this is where you see who really gets it).
• 📝 Assess It! — A short formative check with multiple choice and a fill-in-the-blank vocabulary paragraph.

Print and digital versions are both included. If you want the full breakdown of what happens at every single station, what students produce, and how to set it up, that's in our dedicated Station Lab post.

→ Read the full Natural & Artificial Selection Station Lab walkthrough 8 stations, materials list, teacher tips

The Station Lab is included in the full 5E lesson. You don't need to buy it separately if you're getting the whole unit.

📚 Explain

Here's the real payoff of doing the Engage and Explore before the Explain: by the time kids hit this phase, they've already simulated selection pressure with their hands. They have a working understanding before you ever start naming things. The discussions get deeper, the questions get sharper, and you spend less time defining and more time pushing their thinking.

The Natural & Artificial Selection Presentation walks 7th graders through the full scope of TEKS 7.13D, one concept at a time, with population diagrams on nearly every slide. The deck opens with a quick reset on traits (inherited characteristics that vary among individuals) and adaptations (favorable variations that help an organism survive), then builds out the framework: natural selection (environment is the filter) and artificial selection (humans are the filter). From there the deck zooms in on each process one at a time.

Students learn that natural selection happens when something in the environment (a predator, a disease, a climate shift, a food source) gives some members of a population an advantage. Individuals with helpful traits live longer and reproduce more, passing those traits to their offspring. Over many generations, the population shifts. Charles Darwin worked this out studying finches on the Galápagos. Birds with beaks matched to their available food survived better and had more chicks. Over generations, the beak shapes of each island's finches diverged. Peppered moths in industrial England are another classic example. Before factories darkened the trees, light moths blended in. After soot covered the bark, dark moths became more common because predators couldn't see them. Antibiotic resistance in bacteria is natural selection happening right now, on a fast time scale. The deck includes a built-in Quick Action INB where students walk through a four-generation moth population shift.

Artificial selection is the same basic process, but humans choose the traits instead of the environment. Every breed of dog, from Chihuahuas to Great Danes, came from selective breeding over many generations. Corn, wheat, and broccoli all look dramatically different from their wild ancestors because farmers picked plants with desirable traits and replanted their seeds. Cattle that produce more milk, chickens that lay more eggs, apples that resist certain diseases. All artificial selection. The most important point students need to walk away with is that selection acts on populations over generations, not on individual organisms during a single lifetime. A giraffe doesn't stretch its own neck and pass the longer neck on to its kids. The variation was already there. Giraffes with genes for longer necks happened to reach more food, survive better, and have more offspring. Same mechanism in both natural and artificial selection, just different selectors.

For every example, students see three things: the trait that varied, the selection pressure (environment or human), and how the population shifted over generations. That repetition (different examples, same three pieces) is what bakes the explain how natural and artificial selection verb of TEKS 7.13D into long-term memory.

What makes the Natural & Artificial Selection Presentation different from a typical biology slideshow is that kids are doing something on almost every single slide. It's not a lecture deck. It's a participation deck. "Your answer:" prompts appear on most slides, Brain Breaks reset attention every few slides, Quick Action INB tasks (the population shift simulation, the dog breed match, the corn yield data analysis) show up throughout, and Think About It prompts push deeper into bigger ideas like the praying mantis food chain effect, the corn yield comparison data, and the difference between selecting for survival and selecting for appearance. The deck closes with a Last Look natural vs artificial sort and a Check for Understanding tied back to the Essential Questions.

The Explain materials in this product include:

• An editable Presentation at two differentiated levels (Dependent and Modified), works in PowerPoint or Google Slides
• A guided fill-in-the-blank student notes handout that mirrors the Presentation, with answer key
• A Paper Interactive Notebook (English and Spanish) students cut, fold, and glue into their notebooks
• A Digital Interactive Notebook at both levels with answer keys, for 1:1 classrooms or Google Classroom

The Explain runs across two class periods. The built-in Think About It prompts are where the real discussion happens, so let those breathe.

🛠️ Elaborate

The Elaborate phase is where students stretch what they learned about natural and artificial selection and put it into a project of their choosing. In this 7th grade life science lesson, that's a Student Choice Project board with six different project options plus a "design your own" pathway.

Students might design a four-panel comic that walks a reader through the peppered moth story, build a poster that traces the wolf-to-Chihuahua artificial selection timeline using real images, or write a children's book about Darwin's finches that explains why beak shapes diverged on different islands. There are options for kids who love to write, kids who love to draw, kids who love to build, and kids who love to perform. Whatever the project, the point is the same: students apply natural and artificial selection to a real-world artifact instead of a worksheet.

Choice is the whole point. By letting students pick how they show their thinking, you get more authentic work for TEKS 7.13D and you actually get to see what they understand about selection pressure and population change.

The rubric (the part teachers actually want)

Every project, no matter which option a student picks, is graded on the same rubric. Five categories at 20 points each:

• Vocabulary (20 pts) — At least four words from the lesson are used in context.
• Concepts (20 pts) — At least two key concepts from the lesson are referenced.
• Presentation (20 pts) — The project grabs attention and is well-organized.
• Clarity (20 pts) — Easy to understand. Free of typos.
• Accuracy (20 pts) — Examples and explanations are accurate. The science is right.

Two differentiated versions in one file

The standard version is for students ready for independent application of selection concepts. The Reinforcement version is for students who need additional vocabulary or concept support. Three of the six options are swapped for projects with a tighter vocabulary tie-in, and "design your own" is replaced with "collaborate with the teacher" so kids aren't pitching cold.

✅ Evaluate

The Evaluate phase wraps the unit with a formal assessment. It's not all bubble-in. Several questions hand students a four-generation population diagram and ask them to identify the selection pressure and predict the next generation.

The full assessment has 12 questions across five formats:

• Multiple choice (4 questions) covering definitions of natural and artificial selection, examples of each, and the role of variation in populations
• Hotspot / visual (2 questions) where students circle the example of artificial selection in a set of images and identify the surviving moth on a darkened bark
• Multiselect (2 questions) where students pick all examples of natural selection in a list of scenarios
• Short answer (2 questions) on how a population shifts when the environment changes and why selection acts across generations rather than within an organism's lifetime
• Multipart scenario (2 questions) with a multi-generation selection scenario where kids identify the favored trait and predict the population shift

A modified version is included for students who need additional support. Fewer multiple-choice distractors, sentence-starter scaffolds on the short-answer items.

If you've taught all five phases, this assessment shouldn't surprise anyone. It's a chance for kids to show you they get it.