Minn. Stat. § 123B.06: EVALUATION OF PUPIL GROWTH AND PROGRESS; PERMANENT RECORDS.

Each school district shall provide a testing program for the purpose of measuring pupil growth and for curriculum evaluation, as well as a system for grading and making reports to parents. Each district shall develop an appropriate program of pupil progress and promotion for its elementary, middle, and secondary schools. Each district shall keep accurate and complete individual, permanent, cumulative personal records for all pupils.