Math
I use a guided math approach in my classroom.  Students are divided into 4 groups.  Each day, students will go to four math centers: guided math with Miss Closs (allowing me to see each child every day), math boxes (to review previous skills), and the last two centers vary between a math game, a math skill sheet, reading math related books, and a math activity on the computer.  Also during this time, student take a few minutes to do their "xtra math" (www.xtramath.org) on the computers (generally 4 days per week).

Guided Math

Math Boxes

Math Centers

Ann Arbor Public Schools has a handbook for parents on the use of Everyday Math.  Click here to see it.  The state of Michigan has created a brochure for parents to see what math skills that their child needs to learn by the end of 1st grade.   You may view that here. Many of the computer center websites I found come from here and here.  Some other favorite websites include:
Math Baseball
Math Arcade
Interactive Math Games
IXL Games
Internet for Classrooms Math Games
Johnie's Math Page (Primary)

Practicing these games at home would be useful.  Students should also do fact practice daily at home either on-line (see math baseball above), or may use cards (see the parent guide above to see how you can make a set to use at home).