INTRO TO ARCHITECTURE ... "An Introduction to Architectural Principles" is among the winter courses offered through Stanford Continuing Studies. This class runs Thursdays, Jan. 13 to March 17, from 7 to 8:50 p.m. The class, taught by architect Stephen Atkinson, covers architectural concepts, including function, materials, decoration, structure, formal relationships and classicism. Cost for the two-unit course (ARTH 192) is $365. Information: continuingstudies.Stanford.edu or register in person at 482 Galvez St., Stanford University.
RECYCLE YOUR TREE? ... Christmas trees, cut into 4-foot lengths without any ornaments or tinsel, may be recycled and left at the curb to be picked up on regular pickup days. Flocked trees are not accepted. Managers of apartments or condo complexes may contact GreenWaste at 650-493-4894 for specifics about tree pickup.
GET READY FOR SPRING ... Sherri Bohan will teach a class on "Gardening" for 10 weeks, Wednesdays, Jan. 5 through March 9, from 10 a.m. to noon, at Cubberley Community Center, A-2, 4000 Middlefield Road, Palo Alto. The winter course will focus on natural and low-toxic sprays and creating healthy, environmentally friendly gardens. Cost is $50. Information: 650-329-3752 or www.paadultschool.org.