I really liked your StAIR. I remember learning this in high school and your presentation was clear in the information it presented. I do think another couple of examples would be helpful before going into the assessment.
In the example question, when you answer incorrectly, it doesn't allow you to retry the question before moving on. Also, after the first question in the assessment part, the variables don't match up between the question and possible answers (the equation will say "y" but the answers say "m"). Otherwise, it was easy to navigate and read.