Maybe this already exists but I could see crosswords, etc (ex, Jeopardy-like A&amp;Qs), being used as a learning tool for things like geography and history, allowing students to mentally visualize subject-specific associations (ie, including backwards and sideways) rather than just memorize first-this-then-that type facts.<p>One could throw in identical problems here and there, either stated exactly the same way or differently, in order to create spaced-repition learning, as well as an inside-out understanding of the subject.<p>To give a random example - US geography, and if the student enjoys it or does well, let them continue on with it and grade them on the successive tests for State-specific or foreign country geography, for example. Throw in historical changes to make it multidisciplinary. In other words, let students explore their interests within the larger subject, rather than standardizing everything for everyone.<p>______<p>The Crossword article and the article link that follows, on Horizontal History, inspired my comment. <a href="http:&#x2F;&#x2F;waitbutwhy.com&#x2F;2016&#x2F;01&#x2F;horizontal-history.html" rel="nofollow">http:&#x2F;&#x2F;waitbutwhy.com&#x2F;2016&#x2F;01&#x2F;horizontal-history.html</a>