Third graders explore simple machines. Using specified Internet sites, 3rd graders gather information on types of machines. They define vocabulary words and locate examples of different types of simple machines. Students invent a new...

Seventeen pages of material leave you well-prepared to carry out this instructional activity on levers and pulleys. Photos and diagrams make the instructions clear; resource links provide additional information. The missing aspects of...

Young scholars act as dendrochonologists working to reconstruct a 50 year climatic history. They make a personal timeline.