Students are required to read Wikimedia's general instructions first.

https://www.mediawiki.org/wiki/Project:New_contributors features two pictures of diagrams we draw on a board in brainstorming sessions. They would be more useful as editable text diagrams in wiki pages.

Please create a subpage under your mediawiki.org user page and recreate the diagrams using wikitext and, optionally, html and css. What matters is to reflect the original meaning of the diagrams. Making them visually attractive is a plus, but you don't need to spend much time with appealing graphics.