Unit 2 — October: Water Systems and Natural Resources
Description
This unit focuses on aquatic ecosystems through trout and macroinvertebrate study. Students learn about trout reproduction and habitat requirements by testing water chemistry including temperature, dissolved oxygen, pH, and nutrient levels. A macroinvertebrate study using onion bags reveals stream biodiversity and ecosystem health, with students identifying bioindicator species and measuring organic decomposition. Students explore population dynamics through graphing and analysis of carrying capacity. The unit culminates with natural resource management case studies where students solve real environmental problems and develop public relations strategies to communicate conservation messages through various media outlets.
Essential Questions
- What conditions support healthy aquatic ecosystems?
- How do populations interact within ecosystems?
- What is carrying capacity and why does it matter?
- How do we communicate environmental issues to the public?
Learning Objectives
- Test and interpret water chemistry parameters
- Identify macroinvertebrate species and assess stream health
- Understand trout life cycles and habitat needs
- Calculate feed requirements for fish populations
- Analyze population dynamics using graphs
- Apply carrying capacity concepts to real populations
- Develop and evaluate resource management solutions
- Create persuasive media messages for environmental conservation
Supplemental Resources
- Index cards for identifying macroinvertebrate species during field study
- Graph paper for plotting population data and carrying capacity curves
- Colored pencils for creating ecosystem diagrams and charts
- Markers and construction paper for media campaign materials
- Clipboards for field notes during stream investigations
Engineering, Technology, and Applications of Science
Crosscutting Concepts
Disciplinary Core Ideas
Science and Engineering Practices
Students engage in reading, writing, speaking, and listening tasks throughout all units. They conduct research on agricultural topics using informational texts, write blog posts and project reports, present findings to peers, and engage in collaborative discussions. Students summarize information from diverse media, quote from sources to support claims, and produce informative and opinion writing aligned to agricultural themes such as food systems, animal science, and natural resource management.
Students apply mathematical concepts across all units. They use measurement and unit conversions when testing water chemistry, calculating feed amounts, and designing chicken coops. Students collect and graph data from macroinvertebrate studies and plant experiments, calculate percentages for hatch rates and cost analysis, use area and volume formulas when designing agricultural structures, and apply operations with fractions and decimals in food science and agribusiness contexts.
Students apply scientific practices throughout the curriculum by conducting experiments, collecting and analyzing data, developing models, and constructing explanations. Topics including plant biology, animal systems, water chemistry, genetics, ecology, and food chemistry directly align with life science and earth science disciplinary core ideas. Students engage in engineering design when creating hydroponics systems and chicken coop structures, and they use crosscutting concepts such as cause and effect, systems and system models, and structure and function.
Students examine the history of agriculture, food production policies across cultures, the impact of natural resource use on communities, and economic principles of agribusiness. They investigate how geographic factors influence agricultural production and distribution, compare food systems across regions and nations, analyze the economic interdependence created by trade in agricultural products, and evaluate how cultural practices shape food identity. The agribusiness unit directly addresses economic concepts including supply and demand, entrepreneurship, and the role of resources in shaping economic opportunity.
Career readiness, financial literacy, and 21st century life skills are embedded throughout all units. Students explore careers in agriculture, food science, natural resource management, veterinary science, and agribusiness. They develop personal and entrepreneurial financial skills through agribusiness simulations, plant sales, and grocery cost analysis. Students use digital tools for research, collaboration, and data visualization, and they practice critical thinking, creativity, and communication in team-based agricultural challenges.
Formative Assessments
- Observations of water testing procedures and accuracy
- Journals documenting macroinvertebrate observations and data
- Discussions on population dynamics and ecological concepts
- Group work on natural resource case studies
- Question and answer sessions on carrying capacity
Summative Assessment
Projects including case study analyses and media proposals, portfolio updates documenting findings, and blog posts on environmental management solutions
Benchmark Assessment
— not configured —
Alternative Assessment
Students may demonstrate understanding through a guided water chemistry or macroinvertebrate identification task with teacher support, verbal explanation of findings, or simplified data recording sheets with visual aids or word banks. Alternative formats may include labeling diagrams of aquatic organisms, responding to yes/no or multiple-choice questions about ecosystem health, or creating a spoken or recorded explanation of a conservation concept in place of written work.
IEP (Individualized Education Program)
During water testing and macroinvertebrate study activities, provide graphic organizers with labeled diagrams and pre-formatted data tables so students can record observations without the barrier of open-ended note-taking. Allow oral responses or dictated journal entries in place of written summaries when documenting findings, and offer sentence frames to support participation in discussions about population dynamics and carrying capacity. For case study work and media proposals, breaking the project into smaller sequential steps with frequent check-ins will help students maintain focus and demonstrate mastery of key ecological concepts.
Section 504
Ensure students have access to extended time during water chemistry testing and data analysis tasks, where precision and multi-step procedures can create time pressure. Preferential seating near the instructor during demonstrations of testing procedures supports attention and accuracy, and reduced-distraction work settings are appropriate when students are completing graphing tasks or written reflections on ecosystem health findings.
ELL / MLL
Front-load content-specific vocabulary — such as terms related to water chemistry, macroinvertebrates, and carrying capacity — using visual word banks, labeled photographs, and illustrated reference cards students can keep throughout the unit. Pair verbal instructions for testing procedures with step-by-step visual demonstrations, and allow students to express scientific observations through labeled drawings or oral explanation before transitioning to written output. Where possible, connecting conservation and natural resource topics to students' home regions or cultural relationships with water and land can build meaningful background knowledge.
At Risk (RTI)
Connecting the unit's ecological concepts to familiar, everyday experiences — such as local waterways, fishing, or community water use — can lower the entry barrier and increase engagement with abstract ideas like dissolved oxygen or population dynamics. Providing partially completed data tables, simplified versions of graphing tasks, and highlighted key sections of case study materials allows students to access core content without becoming overwhelmed by volume or complexity. Frequent encouragement tied to observable progress, such as accurately identifying a macroinvertebrate or correctly reading a water test result, helps build confidence and sustained participation.
Gifted & Talented
Students who quickly grasp water chemistry parameters and carrying capacity concepts can be invited to investigate the interrelationships among multiple variables — for example, how seasonal temperature shifts cascade through dissolved oxygen levels, trout survival rates, and macroinvertebrate populations simultaneously. Extending the natural resource management case studies to include real local or regional environmental controversies, or challenging students to evaluate competing stakeholder perspectives using data-backed arguments, deepens critical thinking well beyond surface-level solutions. Students may also be encouraged to design their own media campaign framework or propose an original stream monitoring protocol, drawing on independent research and higher-order analysis of ecological trade-offs.