Karl König devoted his life to children and adults with special needs, founding the Camphill movement in Scotland in 1940. To help children with disabilities learn arithmetic, Dr König analysed approaches to teaching this subject, using lessons from the Waldorf education curriculum. His careful breakdown of each step to learning about mathematics is a treasure trove of ideas for all teachers of these skills, offering practical solutions to common problems. This is a valuable book for all Waldorf teachers and homeschoolers with students who are learning or struggling with mathematics.