3. Measure and draw fractional lengths on number lines and rulers (FP)
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Lesson objective: Measure and draw fractional lengths on number lines and rulers.
This lesson helps to build procedural skill with identifying unit fractions on a number line (and ruler). The partitioning of number lines and rulers are used here to introduce the idea that fractional lengths are invariant. This work develops students' understanding that a length does not change if its position on a number line or ruler changes.
Students engage in Mathematical Practice 5 (use appropriate tools strategically) as they measure and draw fractional lengths on both number lines and rulers.
Key vocabulary:
- align
- length
- number line
- partition
- ruler
- unit
- unit fraction