Texas TEKS 6.5.D

Science6th GradeRecurring themes and concepts

The Standard

examine and model the parts of a system and their interdependence in the function of the system

Texas Essential Knowledge and Skills for Science

Teacher's field guide

What Students Need to Do: Students identify the parts of a system and explain each part’s role. They create a model showing how changes to one part affect other parts and the overall result.
What Mastery Looks Like: Students can label a system model and describe the connections between its parts. They can predict and explain what happens when a part is removed, changed, or stops working.
Common Misconceptions: Students may list parts without explaining how they work together. They may think each part works alone, or assume changing one part cannot affect the rest of the system.
How to Assess It: Give students a labeled diagram of a bicycle drivetrain. Ask them to explain what happens to the bicycle when the chain is removed.

Lesson moves

Build a simple circuit with a battery, wires, switch, and bulb, then remove one component and record how the outcome changes.
Study a bicycle diagram and write which three parts depend on each other to make the bicycle move.
Play a card sort matching system parts, their jobs, and the effects caused when each part fails.
Map the school lunch system, including workers, equipment, food, and schedules, then identify one change that could disrupt service.

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