Teach Scamper
Scamper runs a program the moment she sees it, before she reads it. Teach her to trace first. When you explain it to her, you learn it best: catch what she gets wrong, then answer her questions.
Teach Scamper to trace first
In a minute you'll be the teacher. Get ready to teach Scamper: tracing.
Read one line at a time and keep a little table: a column for each box, a new row each time a line changes one. A loop goes back to the top for every value in its range, so its body runs once per value.