At the high school level there is not a lot of students who need remediation. For the ones who do I like to use differentiated instruction when I can. e.g. changed homework load, #number of problems) In my math classes I give classworks at the end of nearly every class. They have problems on them from that day, if someone needs more help I can do it while the rest are all working on that. I also have a free period everyday that I can help some people in study hall.