A sentence needs a punctuation mark to rest. Today, you'll meet the three most common ones: the period, the question mark, and the exclamation point. Use a period when you're telling something. Use a question mark when you're asking something. Use an exclamation point when you're excited, surprised, or upset about something. Grab a pair of scissors and cut out the cue cards. Put them somewhere you'll see them often. That way, you'll never forget the rules!