Can I just convert the standards-based grades into letter grades?

We understand this change to standards-based reporting is a major shift in thinking, but it would be a mistake to try to convert the rubric scores of 1,2,3,4 to letter grades of A,B,C,D,F. The rubric scores represent a measure of learning completely different from the "points earned" system of letter grades. Performance Levels indicate what a student has learned or needs to learn. Please do not be tempted to provide an analogy or equivalent measure - the two systems are quite different and there is no correlation.