Categories
Limits

Negative Infinity

tina math precalc

 

What’s the fastest way that you could help this student?

Thanks to Tina for the submission! Go check out her very exciting new and remarkable collaboration with some dude, Productive Struggle.

Categories
Conditional Probability and the Rules of Probability Expressions and Equations Limits

Khan Academy Potpourri

I’m sitting on a bunch of Khan Academy questions from users that I marked as very interesting. I never posted them, and I feel a little cheap giving them all their own posts. So I figured I’d just dump the whole lot on you all. These questions reveal interesting things about the way these students are thinking. If you think that you’ve got something interesting to add, either on the diagnosis or prescription side of things, dig into the comments below.

The first is a nice probability puzzler. How did this student get 3/8?

I love this conceptual question.

Not sure exactly why I clipped the first question here, but the second question is great. “Why do they call it a limit?”

A good reminder: some vocab is tricky. Why are these two vocabulary words the one that this student confused?

This is a great point from a kid about variable use.

A little bit of context for this next one: we’re talking about protractors here.

Categories
Limits

“The limit does (not) exist”

Sorry for the title of this post, but I really wanted to link to this video.

Anyway, what’s going through this students head? ¬†What would you say to the student when going over the problem?

(Also, remember to drop into the comments of this post and leave some feedback about the site.)