Last school year, Sanjana Hossain lived just a few steps from her job as a teacher’s assistant and tutor at Great Oaks Charter School, in the center of Newark, N. J. The school was part of a brand-new complex called Teachers Village, where Hossain resided in a three-bedroom apartment with four other tutors. Great Oaks paid the rent as well as a portion of her tuition toward a master’s degree in education.