We should not rely too heavily on spell-checkers. We still need to learn to spell.
Here is a list of commonly misspelled words.
(From Strunk and White’s Elements of Style)
While you SHOULD use your spell-checker before submitting an assignment, don’t forget to also practice spelling.
1. Study the word list above.
2. Have someone read the list to you while you write the words down or have a verbal spelling bee.
3. Run your computer spell-checker on your current work of fiction.