I just created instructions for a faculty member who uses Quizlet so that she can integrate the flashcards within Canvas. There were resources in the Canvas Community about Quizlet along with other LTI's, but nothing (that I could find) that provided just the steps for using Quizlet. So, I thought I'd share them in case anyone else needs them along with my experience using the embed code:
1. Select Settings on the Course Navigation Menu
2. Choose the Apps tab
3. Search for Quizlet
4. Click the +Add App button to add the app to your course
5. Add a Content Page (to a Module) and select the "V" Icon to locate "Quizlet"
6. Search for any public flash cards (including your own) and select the Embed button
7. Save the page.
Quizlet is free and also provides embed code that works really well within a Canvas page. However, when I tried it the game was the default rather than the flashcards. At first, I didn't realize that there is a drop-down to select specific embed code depending on whether you want: flashcards, match, learn, test or spell. However, the LTI seems easier to use for faculty members who are not familiar with the HTML view of the Rich Content Editor.