Montessori Math: Add & Subtract Large Numbers
© 2013 Edoki Academy
Note that Edoki was formerly called Les Trois Elles Interactive. Designed specifically for children who can already read "large" 2-digit numbers like 12 or 78; on up to 9,999, this Montessori-inspired set of three activities presents a step-by-step, drag and drop approach to addition and subtraction. The overall presentation is clean but dry, making it well suited for a large screen classroom display. The first game, called "stamp game" was adapted directly from Montessori. This three level activity asks children to construct two numerals by dragging and dropping small tiles onto a base-ten board. It then asks them to add them together, and enter an answer. Our testers found the tiles to be rather small, and all the dragging required to create larger quantities became tedious. The other two activities are called bead frame and magic slate and both are useful for providing practice with each step of the math problem solving process. As you play, you earn points which can be redeemed for parts in the “Monster lab.” Parent/teacher settings make it easy to toggle on/off the games, or turn on a timer if you like. We especially liked the ability to fine tune the difficulty level to individual children. For example, you can turn off the zero in the number line. There are 12 languages - English, French, German, Italian, Dutch, Spanish, Swedish, Japanese, Chinese, Portuguese, Russian and Korean. It is extremely strong in terms of pedagogy and math theory, making it a useful teaching tool, say, to help a child discover units of ten. It is the second in a series. See also Montessori Math: 1st Operations.
$4.99, iPad, iPhone, iPod Touch (iOS 4.3 or later)
Teaches: math, addition, subtract, multiplication with numerals up to 1,000
CTR Rating: 86%