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When the normally unseen sixth grader Hector discovers he can turn invisible, he learns that he is n... more
Government is broke. The 2004 federal deficit is the highest in U.S. history. The states have suffer... more
Desertification has re-emerged as a topic of global significance as a consequence of the United Nati... more
It s a race against time to solve the clues and save the Golden Hoard. If you fail, the treasure wil... more
A mathematical mystery of calculations. The fearsome pirate Black Beard has buried his gold, and you... more
A mathematical mystery of Shape, Space and Measures. The Mansion Of Mazes has been burgled and you h... more