Noodleverse by K12 Inc

Noodleverse is an interactive, engaging web portal where young children can review and practice core concepts and skills that support English language arts. Noodleverse includes dynamic online activities for grades K, 1, 2, and 3, and content is aligned with the award-winning K12 curriculum. Noodleverse is available as an autonomous set of educational experiences for independent consumers and for those enrolled as K12 students.

Why we like it: Gives well rounded language arts instruction.  The site covers spelling, vocabulary, literature, writing and more.  There are even excellent printable graphic organizers for homeschoolers and parents to use with their children. The site aims to teach concepts in a fun and engaging way.