In general, any time is a good time to proofread your paper before you hand it in. Here are some specific times when proofreading would be a good idea:

1. If you write multiple rough drafts, select the “LAST” rough draft to be the one that you proofread carefully.
2. You could proofread each sentence after writing it, or you could WAIT until you finish a whole paragraph and then go back and proofread the entire paragraph.
3. Each time you edit or add any words to your paper, (even if it is only one or two words), check over the revised part to make sure that it is correct.
4. Most importantly, however, be sure to proofread your entire paper just before you print it out. Proofreading your whole paper carefully should always be the very last THING you do before printing out the final draft. Remember to double-check any lastminute changes for correctness before you print out the final version of your paper. In fact, it is often a good idea to proofread your “final” paper again after it has been printed out. There’s no such thing as “too much” proofreading! 

In general, any time is a good time to proofread your paper before you hand it in. Here are some specific times when proofreading would be a good idea: