Vary the time according to the grade level and topic.
• Use the puzzle as a take-home, self-paced exercise to review old
material or to introduce new vocabulary.
• Have teams play to completion of the puzzle; the first team to
complete the puzzle wins.
• Begin the puzzle in class, stop play when students are only
partly done, and continue play on it the next day. See how
many of your students did home research between the two
game periods.