I’ve been working on an activity for Chain Rule, and have screens with LOTS of randomization and ability to endlessly generate new problems, so that they can essentially have unlimited practice. This has proved to make the self-checking tricky, but I have been able to work through all of those quirks, or so I thought…
So I’m testing this screen and SOMETIMES the self-check is reading the result as wrong when it is definitely correct. Other times, even with the same structure for outside/inside function, it reads it as correct. I’ve been trying to troubleshoot, including setting the parameters in the graph component to see what the “check values” were giving, and then evaluating the “wrong” entry at those same values, and it is all lining up - I don’t see why it is reading “incorrect” on just SOME of the generated functions!
Here are some examples:
It read this wrong:
But this correct:
And also read this wrong:
…but other problems with the sin(kx) inside function, it read correctly.
I am at my wits end and so frustrated! I’ve been working on this (and using increasingly complex functions as they advance screens, so this will be the “finale” screen), and am really happy with how the activity is shaping up, except for this!