After teaching junior high school mathematics for 10 years and serving as a high school principal for 14 years, Dr. Clarence Johnson conducted research as a doctoral student on improving the mathematics failure rates of African American students. You can read about his findings in Roll Call: 2012.

After teaching junior high school mathematics for 10 years and serving as a high school principal for 14 years, Dr. Clarence Johnson conducted research as a doctoral student on improving the mathematics failure rates of African American students. You can read about his findings in Roll Call: 2012.