Homework and Practice

I'm currently doing some thinking and researching into the area of homework and practice. I've done some research into what is the expected amount of these things as well as the different amounts for the different age levels and abilities of students. I'm curious about the thoughts of some other teachers... what is the homework policy for the students in your classroom? How much and what kind of work do you expect your students to complete on their own? Any thoughts on this topic would be great!