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The offices of Dimension U may not have the glamour of Google or Facebook, but they have all the energy of an online start-up, focusing on ways to reach out to the educational community, kids and their parents.

A lot of marketing is done through social media, but Dimension U also arranges tournaments and concerts to engage kids.

A selection of Dimension U t-shirts.

Dimension U bracelets.

Fun to wear while you "Du the math".

The kids at this Brooklyn public school are eager to play and once the game starts, they're completely focused.

Dimension U games are part of the curriculum at this school. The games are immensely popular with both teachers and kids.

Nt's goal is nothing less than worldwide distribution, providing practice in basic math and literacy skills to children everywhere.