Physical Requirements: Ability to physically perform the duties and to work in the environmental conditions required such as maneuvering in classrooms; Standing, walking, sitting for long periods of time, speak loudly and clearly, seeing and hearing things both near and far away, stooping, kneeling, fine finger and hand manipulation in use of a computer, chalkboard, dry erase board or projector; Must be able to sit for up to two (2) hours looking at a computer monitor, using a keyboard and mouse and typing. About Mastery: Founded in 2001, Mastery Schools is a public charter network of 23 K-12 schools in Philadelphia and Camden, serving more than 14,000 students.