Khan Acadmy - K-12. Free Online Academic Content and Resources

IXL - K-12. Online interactive English, Maths & SG National Curriculum Supports - paid Resources

Raz-Kids - Grades K-6. Online interactive books/reading program. - Free Trial, then paid.

Teach Your Monster To Read - Free Phonics & Reading Game

Brain Pop - animated educational resources. Temporarily free during Covid-19.