Homework is due the date after it is assigned, unless there is an absence/illness. Make up work should be completed within the same number of days as the absence. Due dates for projects and large assignments are given in advance via a letter home.
If you ever have questions about an assignment, please call. I allow 2 days for students to redo a failing/poor homework assignment. They must come in for help first. The most important thing to me is that they understand the concepts presented in the lesson.