I was really good about starting most classes (excluding quiz days, normally) with a warm up problem or two. I loved how it got the kids working immediately, gave me time to get my stuff together for class, and even gave me a few minutes to check homework (if I was going to).
And, most importantly, I think a lot of learning happened through those warm ups. Sometimes it was from kids asking each other for help, sometimes it was prompting them to think about a problem a different way, sometimes it was extending their thinking on a problem. Sometimes I reviewed a topic we hadn't seen in a while, sometimes I gave a question as a preview of things to come.
When it appeared that most were done, I'd take a few minutes to talk through (or have students talk through) the answer. This could take up to 15 minutes in class total.
In one of my evaluations a mention was made by my principal about setting a timer; it's something I always considered doing but didn't want to push kids through the problem without giving them a chance to think. And yet it would help with the dawdlers who I constantly had to tell to get working.
I gave the kids a new warm up sheet every two weeks; it has 10 blank spots on it, so after those two weeks were up I would collect the sheet and give them a completion score. One point per day that we had a warm up. So basically, not a big deal unless you didn't turn in the sheets a few times.
I've toyed with the idea of having the kids leave their warm ups in the table folders with the idea that I would periodically check them. I haven't figured out why that isn't a good idea yet. Aside from not making the kids responsible for a paper for 10 days in a row.
So here's my question...
Do you do warm ups in class? If so, how do you work it? Do you set a timer? Do you grade them? Do you have a better way of doing warm ups?
Sorry, that's more than one question. But all feedback is appreciated!