Mathematics Measurement Procedural 6–7 yrs

Measuring length

测量长度

Description

Order three objects by length and compare the lengths of two objects indirectly using a third object

Mastery Evidence

✓ Put three ribbons in order from shortest to longest
✓ Use a piece of string to compare the heights of two objects that cannot be placed side by side
✓ Explain that if A is longer than B and B is longer than C, then A is longer than C

Assessment Prompt

If your child has three pencils of different lengths but can only compare two at a time, can they figure out which is longest — by using a third pencil as a go-between?