This is a run-on sentence here:
Half the class is asleep, the other half is mindlessly staring at their paper doodling.
Let's make it:
Half the class is asleep. The other half is mindlessly staring at their pap
ers, doodling.
This is an issue since I have always prospered in focusing my attention on one task at a time.
Oh, you are making a statement AGAINST the concept of multi-tasking, and this is ery interesting! Often, multi-tasking is explained as a good thing, but the Buddhist practice of mindfulness says otherwise. Maybe you want to mention multitasking and mindfulness in this essay.
Please consider making the last paragraph the intro paragraph! It is great.
:-)