I've been doing online tests for about 7 years now. I have most of my stuff on socrative.com. I can give multiple choice, true/false, multiple select, and short answer. I have them turn their desks around during the test so I can see everyone's screen. I run GoGuardian as well so they are locked to the test site. Source: about 2 years ago

Check out https://voicethread.com/. Source: about 1 year ago

Well, I teach primarily first-year-writing courses and discussion is a significant component of the course. But, rather than thinking generically about discussion, I prep assignments based on goals and outcomes. I choose tools and formats based on what I’m trying to accomplish and rarely does a traditional discussion board assignment work. Essentially, different tech tools allow me to create specific learning... Source: almost 2 years ago

Do you want Canvas-specific features, or would you be okay with tools you could provide a link to in Canvas? For example, I have had success with PearDeck (read the privacy agreement carefully so that you understand how Google will/may use user data) and a colleague of mine has created really cool assignments with VoiceThread. Source: about 2 years ago