Euclid‘s Elements is the most successful and influential textbook ever written. Only the Bible has been published in greater number.
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Euclid's Elements available online free and interactive! | Great Maths Teaching Ideas - 0 views
Trigonometry Pile Up! | Great Maths Teaching Ideas - 0 views
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Cool Cat Teacher Blog: 89 lesson plans and ideas for teaching math - #mathchat - 1 views
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