5 Appendicies

5.1 Embedding the whole Desmos calculator

This is not generally recommended:

if you alter a parameter, you get an annoying “do you want to leave this page” when trying to read next page
can be a squeeze on smaller screens

don’t have too many iframes per page (can be slow to load, take up resources)
student interactions aren’t persistent and nothing gets saved: they get reloaded by a student every time they visit a page
Consider mobile/tablet users where the screen sizes are smaller: sometimes a link is better?
Avoid sites with advertising or a cookie requests that distracts from the content.
there isn’t always much space, so pick simple things to embed (bookdown has comfortable margins)
an iframe won’t display for students if they’re offline or viewing the PDF.

There are no intrinsic accessibility issues with iframes.

However

not all iframes work nicely on mobile browsers.
the organization of the pages may not be clear to screen readers.
navigation (via keyboard or due to increased zoom/limited size) can be challenging.

Test how it appears on your phone
Pick shorter/simple pages or sites that generate an embed code, rather than write your own.
Present a direct link alternative

Stock images from undraw (open source, colour-customisable images that can be used without attribution)