Three opinions about high school and college grading

There should be diplomas all along the way for every year so students don't lose everything by dropping out in eleventh grade.

The lowest grade possible on any assignment should be a 50.

Failing grades should not go on transcripts or especially be calculated in GPAs.  Bad grades should be dropped and the student should simply not get credit for the class.

Ok I have one more to add which is that it should be normal for 4 year bachelor degrees to be broken into sections that include a two year associate's degree.