Knowledge Adventure offers free online games catalogued by age, grade level, or subject. They also have a section for ‘just for fun’ arcade style games. We give this site the thumbs up for its catalog system – it offers more options (like a section just for kindergarten rather than a k-3 section) so you might have to do less digging to find the most appropriate game for your student.
Starfall is a free public service to teach children to read with phonics. Its systematic phonics approach, in conjunction with phonemic awareness practice, is perfect for preschool, kindergarten, first grade, second grade, special education, homeschool, and English language development (ELD, ELL, ESL). Starfall is an educational alternative to other entertainment choices for children.