Kumon workbooks empower students to learn on their own. How?  Like this:

• A gradual progression through content in which each step builds logically and naturally on the previous one
• Intuitive page and activity design, so students know what is asked of them without having to rely on a grown-up
• Carefully structured activities that promote learning through doing (as opposed to passively absorbing information)
• “Just right” challenges that set students up for success
• Sufficient repetition for memory and understanding
• Each book targets a single skill at a specific level, so you can provide the right lesson for each child