Use a stiff brush to remove built up soot and tar deposits on the initial sweep. Then, if the stove flue has a liner (it should, to comply with building regulations and home insurance policies), use a soft brush for future twice-yearly cleaning.
Yes, this can be used as a fertilizer. However, keep the ashes moist and avoid letting them cover any leaves or stems. The leaves should be kept clean for photosynthesis...
With a few exceptions, you can use most of today's cookware on a glass-top stove. The general rules are that your cookware should be heavy, have a flat, even bottom...
Take out anything you don't absolutely need. Ask your teachers if they can tell you when certain books will be needed in class and plan accordingly. If you really have...