Designed by teachers and Award winning app developers, Montessori Math: Add & Subtract Large Numbers presents an in-depth, step-by-step approach to these two essential operations. It also presents fundamental Montessori materials: the stamp game and the bead frame. More importantly, this app makes the concepts of “exchanging” (carrying/borrowing) so obvious that even adults will be surprised. Features: - Our exclusive Dynamic Progression Algorithm to follow each child’s progress individually. - 4 pre-determined levels. - Color-coded place values to allow children to easily identify thousands, hundreds, tens and units. - 3 activities to learn: the stamp game, the bead frame and the magic slate. - 3 games to practice: Missing Digits, Wiz Quiz and Bubble Game. - A number range from 0 to 9,999. - A “Monster lab” for added fun and motivation. - “Advanced settings” containing even more options. - A detailed "Note to parents" explaining the pedagogy behind each game. - 15 languages - Retina display. - Universal app (iPhone, iTouch, iPad, iPad Mini). If you like Montessori Math: Add & Subtract Large Numbers, you will also like our other educational apps: http://edokiacademy.com Recommended ages: From 6 to 9 If you have questions or comments on our app, please email us at support@edokiacademy.com as we cannot answer reviews left in iTunes. KNOW WHAT'S INSIDE As a MOMs with Apps member, we follow the "Know what's inside" best practices for kids’ apps. We take personal data protection very seriously. When using our app, your child will never come across: - advertising - in-apps - links to social networks - personal data request