This set has 8 warmups with accompanying answer keys. (I am adding to this warmup during the 2017-2018 school year, and will be emailing buyers who purchase it with access to the updated version. The price will go up once the set is complete at the end of the year.)
This set of warmups is great for review of the 8th grade Common Core standards each day. I have these waiting on the students' desks when they come in, and after a set amount of time we go over the answers together, usually with several students taking turns doing the warmup under the doc cam. Depending on the pacing of the day, I may have students complete only two of the problems, or even just one if it is a complex problem.
I really strive for mastery of a topic, so my warmups cycle back through previous concepts in the unit to keep my students constantly reviewing. As we move through the units, I will often go back to warmups from earlier units to ensure students are maintaining those earlier concepts as well.