Changed link to Effective Thinking Through Mathematics course in extras (issue #870)#871

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waciumawanjohi merged 2 commits intoossu:masterfrom licjon:effective-thinking-link

Mar 3, 2021

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Commits on Mar 3, 2021

Changed link to Effective Thinking Through Mathematics course in extras

Jonathan Hustad
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Jonathan Hustad
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waciumawanjohi
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