Presenting definitions can be downright boring. One activity for class tomorrow gives students all the definitions from this section (as you can see on the left side of the cover image) and has them work in groups to identify which of the four augmented matrices a), b), c), or d) on the right satisfy those definitions. Individuals will share their decisions (anonymously) by distributing up to 10 votes.
Voting is straightforward and takes only a click of the mouse on an object with a plus sign. To illustrate, I distributed 5 votes for a), one for each option. My mouse is ready to vote HOM for c) but has not yet committed. It is possible to change your mind and move votes around until the timer runs out or the poll is manually closed.
Everyone has free choice but will be influenced by the discussion in their breakout room. Vote accumulations are kept private until after the poll closes. Based on the totals, I can identify (and hopefully clarify) areas of confusion.
I think this will be a productive approach in learning to parse mathematical language while building community and technological competencies.