For an actual implementation of the &quot;students need maps&quot; idea, check out expii: <a href="https:&#x2F;&#x2F;www.expii.com" rel="nofollow">https:&#x2F;&#x2F;www.expii.com</a><p>Click on &quot;Topic map&quot; in the header — it is a real domain-expert-created topic map of many areas of math and science.<p>It&#x27;s a free, interactive, crowd-sourced learning platform that does exactly this, especially for math — the founder is lead Coach of the USA International Mathematical Olympiad team, and a math professor at CMU.<p>f&#x2F;d: I interned there last summer.