I use a hybrid teaching style, and attempt to change what we are doing a couple of times per class period to help maintain engagement! Students learn best when they begin and end class in the same way, with something different in the middle. For this reason, all of my classes begin with a warmup. We then go into the lesson for the day, which includes a minimum of one change to maintain engagement (ex. notes and an activity, a game and group practice problems, etc.). At least once a week students complete an exit ticket as a form of formative assessment before the end of class. About 3 minutes before the bell I have a timer that goes off to signal that it is time to finish up what students are doing, clean up materials, and get ready to leave.