Learn more about the North American Plains Indian tribes and their unusual methods of recording historical events. Learners examine the winter count, a custom by which these groups illustrated information after each winter passed. They...

Imagine living in the hold of a sailing ship for 63 days, enduring rough seas and autumn storms. As part of a study of the voyage of the Mayflower, class members examine an online resource that details life about the ship, watch a slide...

The National Oceanic and Atmospheric Administration (NOAA) has developed a tremendous library of ocean-themed lessons that can be used in a variety of science settings. "Feeding in the Flow" is one of those activities; Its focus is on...

Winter, spring, summer, and fall—take the learning of the seasons beyond the elementary level to the middle school classroom. Curious learners begin by watching videos about the seasons and the rotation of planet Earth. Then,...

The second lesson in a unit on set design focuses on the importance of historical and stylistic research. Working in teams created in the previous session, groups consider what resources they will use as they consider design concepts for...

Pupils work in pairs to investigate what it takes to prove that two triangles are similar. They work through various shortcuts to find which are enough to show a similarity relationship between the triangles. Small groups work with the...

Is this enough to show the two triangles are congruent? Small groups work through different combinations of constructing triangles from congruent parts to determine which combinations create only congruent triangles. Participants use the...