wood, designed to be modular and somewhat reconfigurable by the residents. Three bathrooms (allowing flexible gender designation) would be shared by each cluster of rooms, equipped with shared sinks and individually enclosed toilets and showers. The report viewed shared cooking and dining facilities as essential parts of MIT student life and education. Some dorms would contain dining halls, and others would be designated as "cook-for-yourself" residences. Both types would also have some accommodations for larger group dining and individual or group cooking, including large "country kitchens" for groups of students working together. Informal and formal teaching about diet and cooking would be encouraged, in response to the expressed interest of many MIT students in learning how to cook. Dining halls would be structured for ease of access by other members of the MIT community, including students, faculty, and staff not residing in the host dorm, to facilitate wider social interactions and events. The guidelines say that number of rooms and facilities should be shared dorm-wide, such as spaces for music rehearsal, games, media viewing, studying, exercising, meeting, and other individual or group activities. Makerspaces are increasingly emphasized to support MIT's founding mens et manus ("Mind and Hand") ethos and participation in the arts and athletics. A large enclosed exterior space or courtyard should be provided, gated for security while permitting wider community access for special occasions, and protected from solar glare and excessive wind. The guidelines also state that dormitories should be designed to qualify for LEED gold certification, including central air conditioning to discourage improvised window air conditioner installations and to enable year-round use of the buildings. The new Vassar Street dormitory (Building W46) was specifically designed with these guidelines in mind. Dining options The MIT administration has emphasized incorporation of shared dining facilities into several larger undergraduate dormitories, as places where daily informal social interactions can occur. After discontinuation of "mandatory commons" in 1970, MIT continued to operate dining halls in several dormitories on an opt-in meal plan basis. Required meal plans were reinstituted in fall 2011 for residents of several dormitories, despite the vigorous objections of some students. , the MIT meal plans offer a mix of choices, required for residents of some dorms, and optional for all other undergraduates and all grad students. , the mandatory meal plan dorms are: Baker House Maseeh Hall (the only meal plan hall which is also open for lunch) McCormick