As I recall, that's when she grrrr-d.
Take heart, my love, your students are not alone in their misspelling of a lot.
Spellchecker.net recently published their list of the 15 Most Misspelled Words in the U.S., and guess which word came in second?
Right, alot.
(Perhaps the whole nation needs that little memory aid.)
Here, then, the full list from Spellchecker.net.
Misspellers, beware.