Same strip, different units
Measure the same length with larger and smaller units, and explain the different counts.
Explore this lesson →6 practice questions · Optional read aloud · Thinking pad
Let’s understand the idea.
- The strip stays the same length when we change the measuring unit.
- Smaller units fit more times along the strip. Larger units fit fewer times.
- A foot contains 12 inches. A meter contains 100 centimeters. Use the equal groups to connect each pair of measurements.
Something to notice
Measure the same physical object twice using different length units. Ask the learner to explain the relation between unit size and unit count. The paired scales are exact; drawings are not actual size. Meter/centimeter scales display ten-centimeter graduations, with a close-up showing the structure of one meter. Flexible transfer to other units and actual tool use need observation.
Try it. Change it. Explain it.
Open the lesson to use its pictures and controls. In How it works, connect the picture to the idea. In Play & discover, change the quantities and notice what stays the same. In Your turn, answer questions and use the explanation to check your reasoning.
You can ask for help, draw on the thinking pad, or listen to the question and answer options. Progress distinguishes independent work from work completed with help.
Let’s try it →Curriculum connection
Grade 2 · 2.MD · US Common Core
This lesson is mapped to these standards. A completed activity is practice evidence, not a claim of mastery. Content is checked against the linked official standards and its mathematical models are tested.