I do 99% of the homework with our kids. We have an hour scheduled Monday - Thursday from 4-5 to sit down & go over reading, math, spelling and any other paper or project that comes home in their backpacks. Most days we don't use the full hour, but sometimes we need it.
Almost all the home work is Pre-Algebra and conveniently I am married to an Engineer/Programmer so he is huge with Math :) Once in a while I get to help with Science or Social Studies. But the Math homework is nightly (poor kids ;) )