First of all, I tell parents at the open house to PLEASE schedule doctor's appointments at times other than math class. This helps a lot - parents then think twice before pulling them out, especially for shopping trips, fun times with Dad, etc. Second - we have a school web site where parents can access homework, etc. I post a summary of what we worked on that day. It isn't the same as being there, but, at least, the parent and child can see what we were doing. Actually, this site really, really, helps when the child 'forgets' what to do with the homework when they WERE at school. Third - I ask the parents to drop them off early after an absence and I work with them in the morning before school starts. Last - if all else fails, I give up and just make sure that they have the algorithm. I know that this isn't the best solution, but, if you have a child who is constantly missing school, how are you supposed to teach them any subject? Just sending worksheets home really doesn't help in any subject - have you ever had a child learn what an adverb is by filling out a worksheet all wrong? They do need to be in school to learn.