\input zb-basic \input zb-matheduc \iteman{ZMATH 2003b.01170} \itemau{Knuth, Eric J.} \itemti{Proof as a tool for learning mathematics.} \itemso{Math. Teach. (Reston) 95, No. 7, 486-490 (2002).} \itemab The purpose of this article is to describe an approach to enhance the role of proof in the classroom by finding effective ways of using it as a vehicle to promote mathematical understanding. The author presents and discusses examples of proofs that explain and proofs that merely prove. \itemrv{~} \itemcc{D33} \itemut{} \itemli{} \end