Use this link to access the online textbook for US History. You will find some great information and there is also a test-prep (use keyword SD3 STP)

Puzzlemaker is a puzzle generation tool for teachers, students and parents. Create and print customized word search, crossword and math puzzles using your word lists. Use the FREE version.

Use this site to make your own flash cards.

Use this to calculate almost anything imaginable!

Lots of great activities to try.