HI  @mari_liljefors  Welcome to the Canvas Community.

Tools that I've seen embedded in Canvas are Kahoot (need this to embed  <p><iframe src="https://kahoot.it" width="100%" height="640"></iframe></p>), Mentimetre, Padlet, Answergarden, Flipgrid, educaplay, EDPuzzle, Thinglink, quizlet, learning apps, H5P, amuselabs, usecubes, PhET sims. Also built into Big Blue Button (the Canvas conferencing tool) there is polls. 

Then the great tools already built into Canvas to get a quick pulse check on the class are discussions and quizzes.

Canvas Polls is also an app worth trying. 

Sing out if you need a hand.