It is typically used with students of elementary school age, but is useful for any student of mathematics - especially those who want to solidify their math foundations. Students in Kindergarten or pre-school can begin with Gattegno Math Textbook 1. This book begins with sessions of free-play, which gets the students familiar with the colors and lengths, and possible uses. The sessions of free-play can carry on for as long as necessary. Gattegno Math Textbook 7 deals with such topics as permutations and combinations. This can be done in grade 6, although traditional education systems don't introduce it until highschool.
