One more thought. While a quality teacher is paramount to quality education, so is good curriculum. Case in point, my middle daughter is mildly autistic and has some learning difficulties. She had a tutor to help her get through Algebra 1. Initially, the tutor thought the weaknesses were related to my daughter's learning struggles. As the tutor has served other students from the charter using the same textbook, she has discovered the students have consistent weaknesses. The pattern repeated with my son who generally excels in math. The conclusion is the charter is recommending a lousy text which does not sufficiently cover the material. The quality of what is taught is as important as the quality of the person teaching the subject.