(December 7, 2008). 270 271 Also, "Wikipedia for Schools the Wikipedia series of CDs / DVDs produced by Wikipedians and SOS Children, is a free, hand-checked, non-commercial selection from Wikipedia targeted around the UK National Curriculum and intended to be useful for much of the English-speaking world. Lam, Shyong; Anuradha Uduwage; Zhenhua Dong; Shilad Sen; David. "Read me first: Wikipedia isn't about human potential, whatever Wales says". Retrieved October 8, 2015.