*makes the mistake of asking for drawing requests here for school work*
...........
Let's see........good drawing exercises.....
Got it!
Shading practiceDo two front views of an egg with a little heart mark on the shell.
Draw one where it looks as though the first egg is in the morning light. Then draw the second in midday light.
This should help you begin to understand different points of light........if you hadnt already done so already.
Not only that, i think you would impress your teacher with the subject of your drawing practice too.
I can always think of more if you need any more ........I'll promise not to make them as boring as the last.