Open the instructional slideshow here which includes guided screenshots

Sign into Canvas

Click your course

On the homepage, click "settings" at the bottom on the left-hand side.

At the top of the page, click "Apps"

In the search box, type "Redirect Tool"

Click "add app"

Change "Name" to "ClassBank"

In the URL Redirect box, type https://student.classbank.com/login

In the same box, choose the checkboxes that apply where the teacher wants the "button" to appear.