”Why is it that children have to do 98,000 repetitions of this?” Mr. Papert said, pointing to an addition problem. “One reason is that they don’t know what they’re looking at. They need an object to think about other things with.” (Seymour Papert)
Euchner, C. (1983) Seymour Papert’s ‘Microworld’: An Educational Utopia in Education Week. May 18, 1983. Accessed from http://www.edweek.org/ew/articles/1983/05/18/03200027.h02.html