Interactive problems on a variety of topics, units, concepts. Based on the British curriculum. No feedback for teacher so good for kids own self-assessment. All levels up to grade 9/10 are included.
KS 3 = Middle school. GCSE = Grade 9/10 (and possible some grade 8).
Search for interactive games, puzzles and quizzes on any topic or grade level. You can actually join this website for $49 per year, but without joining you already have access to many shared activities.
Interactive practice problems based on American algebra 1, geometry, and algebra 2 syllabi. Instant feedback to students. Good variety of problems on each page.