Starfall.com started out as a free educational resource for teaching children reading through phonetics, but has since grown to add a paid math section, “Starfall Math“. The Starfall math section is made up of several math topics:
The majority of the math content at Starfall is only available with a signup, at https://more.starfall.com/memb/join1.php. Registration costs $35 for a home user, $70 for a teacher membership, $150 for a classroom membership and $270 for a school membership. Memberships are valid for one year.
The Starfall Math site is colorful, accessible, and best suited for children in kindergarten or 1st grade.