Here are some great websites for review and practice.
     Starfall    -  A fantastic site for phonics.  Many games and book can be accessed.
    PBS Kids   - Exciting interactive games for both reading and math.
    ABCYa    -  This site is targeted to specific grade levels and has a lot of games for reading and math!!
    Storyline Online  -  A GREAT way to read a variety of exciting books!
    Symbaloo Math - A variety of math games geared towards kindergarten skills.
    Symbaloo Phonics - A super site to work on phonics skills.