MITCH Charter School. Who we are. MITCH Charter School is entering its 21st year of partnership with TTSD as a public charter school with an agricultural focus. We are a small school of about 250 students and a committed staff of 24. Our teachers come from diverse walks of life and educational experiences. Class sizes range from 15-25 in grades K-4, and a co-taught class of 30 in grade 5. Our teachers work closely in grade level teams to develop ...