Light up sequence scientific calculator buttons

It happened to me! I was able to do the scientific calculator calculations from the book with a few retries, then on the exam I kept getting nonsense from the scientific calculator because I was confused.

While doing the practice problems if the calculator knew what I was doing then the keys lit up in sequence my ability to use the scientific calculator would have gone way up, benefiting exam scores.

So, the calculator glances at the textbook, know which exercise you are doing, then lights up the keys at the correct order. This builds up fluency. Of course some of the exercises could also be done unprompted. There is a piano keyboard that does this, ostensibly to cause learners to more rapidly learn musical keyboarding.