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Overview

This 5-day unit engages 8th grade students in exploring natural selection using a variety of interactive models, simulations, and hands-on activities that align with NGSS standards (MS-LS4-4) and Common Core Science Literacy standards. Students will analyze data, explain how genetic variation affects survival and reproduction, and understand how environmental changes drive species adaptations over generations.

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Standards Alignment

Next Generation Science Standards (NGSS)

• MS-LS4-4: Use mathematical representations to support explanations of how natural selection leads to changes in populations over time.
• MS-LS4-2: Construct explanations for how environmental and genetic factors influence traits in species.

Common Core State Standards (CCSS) Alignment

• CCSS.ELA-LITERACY.RST.6-8.3: Follow precisely a multistep procedure when carrying out experiments.
• CCSS.ELA-LITERACY.RST.6-8.7: Integrate visual information from charts and models with text in science.
• CCSS.MATH.CONTENT.6.SP.B.5: Summarize numerical data to describe distributions and variability relevant to survival traits.

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Day 1: Variation and Mutation Exploration

Essential Question:

What traits seem to be beneficial based on the data presented?

Learning Targets

• I can explain how genetic variations occur through mutations.
• I can identify the role of mutations in creating diversity within a species.

Success Criteria

• Accurately describe mutation's role in producing new traits.
• Correctly interpret genetic variation in a model or simulation.

Materials

• "Adaptation of the Hand" lab materials (paper, scissors, markers)
• Dyslexia-friendly handouts summarizing key vocabulary with clear fonts & spacing

Activities (60 min)

1. Engage (10 min): Use a short, dyslexia-friendly video excerpt explaining mutations and genetic variation with closed captions.
2. Explore (25 min): Students perform the "Adaptation of the Hand" lab, creating different hand shapes to simulate genetic variations.
3. Explain (15 min): Facilitate a class discussion using models showing how mutations lead to diversity within a population.
4. Elaborate (5 min): Use a data chart summarizing survival rates associated with different hand types—students answer the guiding question: Which hand gives the best survival chance? Why?

Differentiation

• Pair visual learners with verbal presenters during discussion.
• Provide graphic organizers to support students with processing difficulties.

Extension

• Advanced learners design their own “mutation” and predict changes in survival using given environmental scenarios.

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Day 2: Natural Selection Variables

Essential Question

How do organism traits and environment affect each other over time?

Learning Targets

• I can explain the variables involved in natural selection (variation, inheritance, differential survival).
• I can use models to compare reproductive success among species.

Success Criteria

• Define and illustrate the four variables of natural selection.
• Analyze and communicate species data clearly using models.

Materials

• "Natural Selection Practice" worksheet
• Population Adaptations simulation displayed on smartboard

Activities (60 min)

1. Review & Introduce (10 min): Brief quiz using dyslexia-friendly font identifying natural selection variables.
2. Simulate (30 min): Students work in pairs on the Population Adaptations Simulation, manipulating environmental factors and recording species survival.
3. Share & Discuss (15 min): Whole class discussion using chart paper to map how traits and environments co-evolve.
4. Write (5 min): Exit ticket answering: What variable do you think has the biggest effect on survival and why?

Differentiation

• Provide sentence starters for ELL and writing support students.
• Use peer-assisted learning pairs for simulation exploration.

Extension

• Have students write a short story from the perspective of an organism adapting to environmental change.

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Day 3: Adaptations and Survival

Essential Question

How can a small change to an individual organism have a big effect on its survival?

Learning Targets

• I can explain how adaptations result from beneficial mutations.
• I can use models to demonstrate the connection between adaptations and reproductive success.

Success Criteria

• Identify common adaptations with examples.
• Clarify how adaptations influence survival likelihood with supporting evidence.

Materials

• Bird Adaptations cards
• Camouflage and Mimicry activity kits
• Dyslexia-friendly reading passage about adaptation

Activities (60 min)

1. Introduction (10 min): Read excerpt aloud with visual supports about bird adaptations and mimicry.
2. Hands-on Activity (20 min): Students sort Bird Adaptations cards into functional groups (e.g., beak shapes, camouflage types).
3. Camouflage Lab (20 min): Using the Camouflage and Mimicry Activity, students test survival success rates of "camouflaged" vs. "visible" models.
4. Discussion (10 min): Reflect on how small phenotype differences create survival advantage.

Differentiation

• Provide audio recordings of reading materials.
• Use color-coded labels and tactile materials for hands-on learners.

Extension

• Advanced learners research a specific adaptation and present its evolutionary advantages.

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Day 4: Model Natural Selection

Essential Question

What evidence supports the claim that environmental conditions cause species to change?

Learning Targets

• I can use models to explain natural selection.
• I can analyze evidence supporting environmental impact on species evolution.

Success Criteria

• Successfully interpret models showing population changes over time.
• Cite specific evidence from models linking environment to species change.

Materials

• Build a Zombie Activity materials (cards representing genetic traits)
• Natural Selection Simulation (classroom computer)

Activities (60 min)

1. Build Activity (20 min): Using "Build a Zombie," students model survival based on trait combinations.
2. Simulation (25 min): Run the Natural Selection Simulation as a class projecting survival probabilities over generations.
3. Evidence Discussion (15 min): Group discussion on how environmental changes reflected in the simulation affect trait prevalence.

Differentiation

• Provide printed visual instructions for build activity.
• Group students heterogeneously to foster peer support.

Extension

• Challenge advanced learners to manipulate simulation variables to create their own natural selection scenario.

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Day 5: Synthesis and Application

Essential Question

How do organisms and environment evolve in a continuous cycle?

Learning Targets

• I can explain the cyclical relationship between traits and environment over time.
• I can evaluate data to support claims about population adaptation.

Success Criteria

• Create a concept map showing interaction between traits, environment, and natural selection.
• Analyze data from graphs/models and write evidence-based conclusions.

Materials

• Evolution of Deer Mouse Interactive (projector)
• Data tables and graphs handouts with dyslexia-friendly font

Activities (60 min)

1. Interactive Model (25 min): Class observes and manipulates the Evolution of Deer Mouse Interactive, noting trait frequency changes.
2. Data Analysis (20 min): Students work in small groups analyzing provided data tables and graphs on population changes.
3. Concept Mapping (10 min): Students individually create maps connecting mutation, adaptation, environment, and natural selection.
4. Summary Discussion (5 min): Share insights and reflect on the essential questions.

Differentiation

• Provide templates for concept maps for students needing scaffolding.
• Use paired reading strategies to help with data interpretation.

Extension

• Students write a short essay defending or challenging the claim that species change through environmental pressures, citing specific evidence from the week’s activities.

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Vocabulary Support

Word	Dyslexia-Friendly Definition	Visual Aid Idea
Trait	A feature or characteristic that an organism has	Picture of different bird beaks
Genetic Variation	Differences in genes among individuals	Diagram showing gene differences
Natural Selection	Process where better traits help organisms survive more	Chart showing survival rates
Mutation	A change in a gene that can create new traits	Cartoon gene symbol changing color
Offspring	The young produced by parents	Parent and baby animal illustration
Adaptation	A helpful trait that improves survival	Camouflage example picture
Niche	Role or job an organism has in its environment	Food chain diagram
Mimicry	When one organism looks like another	Butterfly and leaf comparison
Concealing Coloration	Coloring that helps an organism blend in	Chameleon image

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Teacher Notes

• Use explicit vocabulary instruction daily with visual symbols and repetition.
• Foster a classroom culture valuing curiosity, trial, and error especially during simulations and labs.
• Regularly check for understanding with quick formative assessments (exit tickets, thumbs up/down).
• Encourage collaborative learning to leverage peer strengths and support diverse learners.

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Summary

This 5-day unit leverages hands-on activities, data analysis, and interactive simulations carefully scaffolded with vocabulary support and accommodations to optimize accessibility. Students build a strong conceptual understanding of natural selection, preparing them to think critically about evolution and species survival in changing environments.