Counting | Assessment Review
This 60-minute Grade 9 assessment review lesson helps students practice counting strategies, organize information clearly, and solve very easy counting questions with confidence. The lesson is designed for quick reteaching, guided practice, and a short formative assessment.
| Term | Definition |
|---|---|
| counting principle | A rule used to find the total number of possible outcomes or arrangements. |
| systematic listing | Writing out possibilities in an organized way so none are missed. |
| tree diagram | A branching diagram used to show all possible choices step by step. |
| product rule | A counting strategy that multiplies the number of choices for each step. |
| outcome | A possible result or answer in a counting situation. |
Display 2–3 very easy counting questions. Model one answer slowly, emphasizing organization and checking for missed options.
Solve the warm-up individually, then compare answers with a partner.
Review systematic listing, tree diagrams, and the product rule using one simple example for each.
Copy key examples and ask clarifying questions as needed.
Work through 3–4 review problems with the class. Prompt students to explain why a strategy works, not just the final answer.
Solve problems aloud, show work, and correct mistakes with teacher support.
Provide a short set of assessment-style questions. Circulate to support students who need it.
Complete the practice independently and show all work.
Collect an exit ticket with 2 short counting questions to check understanding.
Complete the exit ticket individually.
Review common errors and highlight the best counting strategy for different question types.
Share one strategy they found useful and note what to study next.
End by reviewing the three main counting strategies and asking students to name one situation where each is useful. Reinforce that careful organization helps prevent missing or repeating options.
Formative assessment will be collected through class participation, guided responses, independent practice, and a 2-question exit ticket. Student work should show a correct method and a reasonable final answer.
Assign 4–6 very easy counting review questions for practice. Include one question using a list, one using a tree diagram, and one using multiplication as a counting strategy.