On this interactive site students practice time and mass skills. By the end of the lesson students will be able to describe the mass of more than two objects and record the mass of three objects by lifting.

Second graders worked on telling time to the hour and half hour earlier in the year. Now they will apply their understanding of counting by 5s to telling time to the five minute interval.

This lesson focuses on probability theory for predicting the outcome of flipping a coin, and then flipping it multiple times.

This lesson focuses on randomness; it explains that what we often think of as random is only random because we do not have the tools to make better predictions. However, true randomness does exists -- at the very foundations of matter. A...

This instructional activity helps children make a connection between the digital and analog clock. In general, the number system is based on units of ten which can sometimes make it difficult for children to realize that time is based on...

In this activity, students investigate the impact of tariffs on businesses and consumers during the 1880s by looking at a political cartoon, solving a short math problem, and comparing protectionism between time periods. They then...

In this project, students will conduct an experiment to determine the percentage of seed that will germinate in a given time frame. Students will produce charts and graphs to represent the results algebraically. Mathematics and...