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<p>Believe me, Trivedi is very careful to show students respect when he calls on them, he makes it clear to everyone that he doesn’t tolerate people laughing at the person called on. Also, the people who do get called on tend to be talking and/or not paying attention.</p>
<p>The bad news is that if you’re scared to answer when you get called on you won’t be a very effective Trivedi bingo player.</p>
<p>Also, as far as Calculus goes, there is tons of Calculus material available online, don’t hesitate to use that if you’re at all unsure on any concept.</p>