[Free Registration/Login Required] In this lesson students learn how to evaluate expressions using a calculator. Students watch a video tutorial, explore guided notes and attempt practice problems.

[Free Registration/Login Required] This flipchart is a multi-subject themed primary unit around the concept of oceans. Reading, Math, Science and Social Studies activities revolve around an ocean theme. In Part 3, students work on using...

Blaise Pascal, the seventeenth-century French mathematician, thinker, and scientist, built the first mechanical adding machine in 1642 based on a design described by Hero of Alexandria (2 CE) to add up the distance a carriage traveled.