Realistically, not every student is going to be good in every subject for a variety of reasons. A "D" grade in a few classes should not prevent a student from graduating.

While a student may not do well in some subjects, they should pick some subjects where they can do well. Perhaps there is vocational training that could be utilized for high school credit, such as carpentry, plumbing, wiring, welding, etc.

List of all Occupational Licenses required in Washington
http://www.dol.wa.gov/listoflicenses.html

Please do not allow the grade point average requirement for high school graduation to be lowered.