Thanks to UNICEF, this school has two concrete classroom buildings and some desks.

NPR: The Missed Education of African Girls

Universities, for example, have not only classroom and administrative buildings to pay for but also the dormitories and expansive libraries for students.

FORBES: Connect

Hybrid courses free up classroom space, which means that an institution can enroll more students without making pro rata investments in buildings.

FORBES: Q&A with Christensen and Eyring on their new book: "The Innovative University"