Many students do not understand how important it is to complete (and turn in) every single assignment. They think that missing a paper or two does not make much difference in their overall grade. I have tutored students before who were failing in a course who really weren’t doing that badly on the work they did. They seemed to understand the concepts as we worked through them. But, because they did not do all the work, their grade was terrible.
Help your child understand this concept. Show them how to calculate an average (add all their grades together and divide by the number of grades). Then do some pretend calculations to show them the difference between getting an 85, 79, 90, 88, and 100 (average is 88.4), versus getting an 85, 79, 90, 0, and 100 (70.8 average!). At my school the 88.4 is a “B” and the 70.8 is an “F.”
One missing grade makes a huge difference.
Sometimes, the issue is not that they did not do the work. It might be that they forgot to print it out, lost it between home and school, or put it in the wrong notebook. Parents can help with this, too. If these are issues for your child, they might need an organization system to help them keep up with their work. Check out A Notebook System That Aids With Organization for an idea that might help them keep up with their homework.
Or, they might need a checklist to use before leaving home in the morning. Organization Tips to Eliminate the Forgotten Homework, Lunch, Sneakers… provides you with one method that has worked for many students.