Teacher Monitoring Guide
Grade 8 · Cycle 7 · Week 1 — Evidence of Chemical Reactions

Learning Goal

Students will investigate observable indicators of chemical reactions and differentiate between physical and chemical changes using macroscopic evidence and particle-level models.

Station Checkpoints

Station 1 — Hook & Phenomenon

Look for: Students connecting the phenomenon to prior knowledge and generating testable questions

Common misconception: Bubbling always means a chemical reaction — counter with dissolving carbonated water (physical) vs. acid-carbonate reaction (chemical); challenge students to identify the defining difference

Station 2 — Investigation / Data Collection

Look for: Accurate data recording and identification of emerging patterns in the evidence

Common misconception: Chemical reactions only happen in chemistry labs — inventory everyday chemical reactions: digestion, combustion in engines, photosynthesis, rusting iron, baking bread

Station 3 — Sense-Making

Look for: Students revising their model based on evidence collected during investigation

Common misconception: Color change always proves a chemical reaction occurred — include mixing colored non-reacting solutions as a physical change counter-example

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.

"I notice that _____ because _____."
"The evidence shows _____, which means _____."

Enrichment Threads (be ready to discuss)