This PowerPoint presentation includes 2 weeks of fun and useful bell ringers for middle and high school students. Many administrators want teachers to have a bell ringer up for students at the beginning of each class. This is a fun way for students to transition to "classroom mode." I sometimes give a piece of candy to the student who is the first to figure out the brain teaser or critical thinking bell ringers. Sometimes I take up the bell ringers for a classwork grade just to ensure that students complete them each day. I hope you will enjoy using these bell ringers with your students!