Tetsuya Miyamoto, the Japanese educator behind KenKen, has crafted these math puzzles into great games for learning and brain training.
Structure and features
Educational games for kids and a teachers section for math teacher resources.
Teacher notes
KenKen classroom program for teachers.
Every week, you get an email with a set of free KenKen puzzles that is for student use. As the challenge level subtly shifts week to week, students develop their math and logical thinking skills without even knowing it.