Posted on July 12, 2018


Going to start w/ “integers early” version and an interactive “let’s put these degrees where they’d be on the thermometer” thing.

There are 31 activities that come up on Geogebra when I search for “thermometer,” including 1 from Illustrative Math that has an activity with a word problem, where you can use the activity to figure it out.

It bugs me a little, though, and I figured out why:   it’s the technological antithesis to instructional routines.   There’s a whole separate learning curve for how to use the thermometer to figure things out.

One of the main reasons ALEKS is so much easier to use than Connect is that its interface is consistent.   With connect, it’s not even consistent where it wouldn’t be hard to be:   sometimes when you’re asked for an equation for a line the input says y=[INPUT HERE] and sometimes it says [INPUT HERE]; if you don’t put y= in the second kind, or you do in the first, WRONG.   It’s cognitive clutter.  Aside from that you have to figure out all kinds of different formats – and “worked example” lets you see it modeled, but yes, I’ve seen students mimic worked examples to get things “right” because they could mimic the worked example and plop the numbers in the right places.

I didn’t answer the questions so the snap doesn’t have the thing dragged to line up to emulate the situation.


Here’s a Geogebra screenshot and erm, yes, the first issue is it says there are 3 situations and there are 2.   Yes, this is why I’m not going to publish my own efforts:   this stuff happens. geogebrathremo2