National Council of Teachers of Mathematics
Eruptions: Old Faithful Geyser
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.
Curated OER
Earth's Rotation Changes and the Length of the Day
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...