The website Enchantedlearning.com has a wealth of free printable activities on a variety of subjects from famous artists to foreign lands. There are materials geared toward preschool and elementary grades and are perfect for use at home or in the classroom.
The best way to understand what's going on in your kid's classroom is to volunteer. After you have volunteered for a while, you will become invisible to the teacher and other students. They will begin to act as they normally do. You will then learn about the academics, but, more importantly you will understand the climate and your child's true educational experience more than you would through any report.
Use a regular deck of playing cards. Remove the face cards. Deal evenly to two players. Each player turn over two cards and add or multiply to get a total. Whoever has the largest total can keep all four cards. If the total matches, turn over two more cards each and add or multiply. The winner keeps all cards. First player to have the whole deck wins!