Rice University offers an impressive online project about Galileo Galilei, his life and work. Includes a glossary of terms, a timeline, maps, pictures, primary texts, family letters, and sketches.

The goal of this lesson is for middle schoolers to use manipulatives to add integers, creating concepts rather than memorizing rules. This lesson will be related to the 300 Spartans who battled the invading Persians at the Battle of...