Measuring LengthChoosing the right unit, and the rules that make a measurement…2nd GradeA measurement anyone can repeat needs a standard unit and a careful start.1PICK A UNITSmall things: centimetres or inches. Rooms: metres or feet.2START AT ZEROLine the object up with 0, not with the end of the ruler.3NO GAPS, NO OVERLAPSIf you move the ruler along, start exactly where you stopped.4READ AND RECORDAlways write the unit. '14' means nothing; '14 cm' meanssomething.HANDY BENCHMARKS1 cm ≈ a fingernail · 1 inch ≈ a thumb joint1 m ≈ a big stride · 1 foot ≈ a school rulerEstimate before you measure. Being close builds a feel for size thatthe ruler cannot.Measuring Lengthwww.littleactivity.com

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Math · 2nd Grade

Measuring Length

Choosing the right unit, and the rules that make a measurement trustworthy.

How to use it

Measure the same table with a ruler and with hands. Discuss why hands are unreliable.

Free · print-ready PDF · US Letter and A4

Grade
2nd Grade
Ages
7–8
Subject
Math
Pages
1

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