This is a fun way for students to review the different ERAs and PERIODs in geologic time. Students fill in a bingo board and try to connect four to win. Possible clues are provided as well as a link that has other events to use as clues. It is recommended that students have a resource to use (textbook, notes) so they can practice the time periods without having to memorize facts. This is a high interest way for students to bring life to a typically dry and difficult topic.