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Grade 2 · unit review

Review: Build and Read Whole-Unit Data Displays

Use picture graphs, bar graphs, whole-unit line plots, and category comparisons.

Download reviews and answer keys

Bring the unit skills together

Use these 4 new cases to check your reasoning. Choices are temporary and are not saved to an account, sent to staff or recorded as school grades. Download your current review choices before leaving or reloading.

Unit review questions
1. Key: one square means one vote. A category has 8 squares. How many votes does it show?
Need a hint?
  • Read what the symbols count as well as their value.
  • Do not assume a symbol is a physical item rather than a recorded response.
2. On a zero-based whole-number scale, a category bar ends at 9. What count does it represent?
Need a hint?
  • Follow the bar endpoint across to its scale value.
  • Bar width is not the recorded count.
3. Lengths in cm are [5, 5, 5, 5, 6]. How many measurements equal 5 cm?
Need a hint?
  • Place one mark per observation, including repeats.
  • Stack height counts frequency, not measured length.
4. A record has walk 11, bus 8, and bike 3 responses. How many more walk than bus responses are recorded?
Need a hint?
  • A difference and a combined count answer different questions.
  • Do not extend a small fictional record to everybody’s preferences.

The download contains your current choices and any checked feedback. Keep the separate transfer-task work in your own document; downloading its instructions does not mark it complete.

Use the skills in a new task

Use lengths 3,4,4,5,5,5 cm to make a line plot and identify the most frequent length.

Work on paper or in your own document. Explain the choices you made.

  • Draw or label the numbers or shape features the task gives you.
  • Say why each calculation or shape choice follows the ideas in this unit.
  • Check that your answer fits the story or drawing in the task.
Compare with a model response

There is one mark at 3, two at 4, and three at 5. Six observations are represented; 5 cm is the most frequent length in this supplied set.

A different response can also meet the criteria. Compare the evidence and reasoning, rather than copying the wording.