Created by Joshua Hori at UC Davis
Canvas is pretty accessible and can meet WCAG 2.1 lvl AA guidelines, but content creators (instructors), can create inaccessible courses if not all the steps are followed. The built-in Canvas Accessibility Checker will find a lot of mistakes and help fix the issues, but there are a few hiccups to be aware of. In this article, we’ll address accessibility testing, issues to be aware of, and resolving the issues.
(X, d)\left\{\begin{array}{c} \text { set } X \text { distance } d: X \times X \rightarrow \mathbb{R}_n \geqslant=\{\leq \in \mathbb{R} \mid s \geqslant 0\} \\ \forall x, y \in X: \quad d(x, y)=d(y, x) \\ \quad d(x, y)=0 \Leftrightarrow x=y \quad B_r(x)=\{y \in X \mid d(y, x)<r\} \\ \forall x, y, z: \quad d(x, y)+d(y, z) \geqslant d(x, z) \end{array}\right.