To all you folks who say you don't want your student's head down in the cockpit reading a checklist while in the pattern, and a simple memorized flow is good enough for the simple training airplane: You are the ones who are training us NOT to use a checklist.
Yeah, you don't want your student actually taking the time to look down at a list, find the place on the list, read & interpret the item, look up or over at the item, accomplish the item, bla,bla,bla.
You want your student to be able, from memory, to accomplish the checklist, then bring the checklist into his organized scan. A quick look to confirm that the items have been accomplished.
It's all about the training, Man. All of us can be trained to include the checklist into our outside scan. Look down for a second. If you can't find the item in one second, then you need to "dry-fly" until you can look down at your checklist which is on a knee-board strapped to your leg, and look straight at the checklist item, just like you take a quick glance at your airspeed or altitude. Look back up outside, keep flying, look inside at the checklist item, confirm it is completed, and continue in this fashion.
Of course, it takes practice. Practice, practice, practice. Just like it takes practice to scan the instrument panel without comprimising safety. The checklist is one more item to include into the scan.
If we learn to do this from the start, it becomes a natural habit. It does not require having your head down in the cockpit.
It becomes a bothersome task when we are trained NOT to use a checklist in our primary days of going around the pattern 10 or 12 times WITHOUT using a checklist.
Never mind that you can safely memorize and execute a pre-landing checlist on a 152 - the act of including it in your scan is what you are training.
Remeber that you are always training. If you are not using a physical checklist, then YOU are teaching your student to NOT use a checklist.