Prodigy
Prodigy is a great site for your child to work on their math skills. After they successfully accomplish a concept the game automatically moves them onto the next skill. Prodigy covers skills in the following domains: Operations and Algebraic Thinking, Numbers in Operations in Base Ten, Measurement and Data, and Geometry. These four domains fit into the first grade standards.
I will email or Dojo you your child's log-in and password.