Level 2: Measuring change

Change and motion · level 2 of 8 · rough age 7-8 (a guide for parents; anyone can start anywhere)

In level 1 you learned to notice change: bigger or smaller, fast or slow, steep or gentle. In this level you put numbers on change. You find out exactly how much something grew or cooled, compare speeds fairly even when the races were different, read change from tables and charts, and tell steady change from change that speeds up or slows down. The level ends with your own growth journal: a bean plant, a ruler and two weeks of careful measuring.

Lesson	You will be able to
How much did it change?	Find how much something went up or down by counting on, including temperatures below zero
Comparing speeds fairly	Compare two movers when they went the same distance, the same time, or neither
Change charts	Read a table and a bar or line chart of temperatures, and find when it rose or fell fastest
Steady and not steady	Tell steady change (the same each time) from change that grows faster and faster, in tables and pictures
Speeding up and slowing down	Use positions marked every second to tell if something is speeding up, slowing down or stopped
A growth journal	Measure and record a growing plant, and tell the story of its growth from your numbers

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