Very nicely crafted game.
Very professional looking, and a lot of fun, too. My score was 313.
The music loops get a little repetetive after a while, so I marked the Sound down a little. Otherwise, the voice of the teacher was great, as were the rest of the sound effects.
Perhaps one way to overcome this would be to have "themed" levels, with different music in each one? Just a suggestion.
Overall, an excellent game.