Large classes are often encouraged to have ombudspeople, or student representatives, who can voice suggestions and concerns to the teaching faculty. For large core classes, one ombudsperson is often chosen from each house. All of the students then meet with the professor, TAs, option representatives, or some combination of the above at least once before midterms and once after midterms. Faculty usually ask students to email them if interested in being an ombudsperson for the class, and some subset of these students is chosen. This program facilitates communication between students and the teaching faculty.