One of the women with whom I work, Donna, has a son in third grade. Part of his daily homework is to practice his spelling for his weekly tests. So, together, Donna and her son go over the words for the test, both meaning and spelling of the words.
A few weeks ago, her son brought home his test. He scored 97%, missing only one word. The word was "clock." Part of the test was to use each spelling list word in a sentence. His sentence? "My dad gave my mom a clock for her birthday" -- only it seems he'd accidentally omitted the letter "L."
Donna said there was no comment on the test, just the biggest check mark she had ever seen.