Teacher Monitoring Guide
Grade 8 · Cycle 1 · Week 6 — Energy Transfer in Collisions

Learning Goal

Students will apply conservation of momentum and kinetic energy to analyze elastic and inelastic collisions, and explain how real-world collisions involve energy conversion to thermal energy and sound.

Station Checkpoints

Station 1 — Hook & Phenomenon
Look for: Students connecting the phenomenon to prior knowledge and generating testable questions
Common misconception: In a collision, the heavier object always wins — use momentum data to show that velocity matters as much as mass; a fast lightweight object can transfer significant momentum
Station 2 — Investigation / Data Collection
Look for: Accurate data recording and identification of emerging patterns in the evidence
Common misconception: Energy is lost in collisions — clarify that energy is conserved but converted to non-mechanical forms (heat, sound, deformation); only elastic collisions conserve KE
Station 3 — Sense-Making
Look for: Students revising their model based on evidence collected during investigation
Common misconception: Cars crumpling in crashes are poorly designed — explain that crumple zones deliberately increase collision time to reduce peak force on occupants (impulse-momentum theorem)

Exit Ticket Monitoring

Score Range Interpretation Next Step
18–23 pts Meeting target Extend with synthesis question
10–17 pts Developing Small group re-teach at day start
0–9 pts Needs support 1:1 intervention before next station

MTSS Tier 2 Supports

For students scoring below 10 pts on the exit ticket: use the sentence frames below during the next class's hook.