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Activity
National Council of Teachers of Mathematics

Eruptions: Old Faithful Geyser

For Teachers 9th - 12th Standards
How long do we have to wait? Given several days of times between eruptions of Old Faithful, learners create a graphical representation for two days. Groups combine their data to determine an appropriate wait time between eruptions.
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Worksheet
Curated OER

Earth's Rotation Changes and the Length of the Day

For Students 7th - 10th
In this Earth's rotation and day length learning exercise, students are given a table with the period of geological time, the age of the Earth and the total days per year. Students calculate the number of hours per day in each geological...