These free online materials from Goodwill Community Foundation cover basic technology, literacy, and math skills. Separate sections focus on Everyday Life, Math & Money, Computer Training, and Work & Career.
Basic mathematics is designed for anyone who needs a basic understanding of mathematics concepts and operations. Instruction is carefully sequenced to follow a logical order. Concepts are presented in clear, simple terms.
BBC Skillswise is an excellent site for basic math and English skills. It includes factsheets, worksheets, quizzes, and games to help you improve your skills. (Note that this site is British and uses British spelling rules.)