With answers.
First ed.: published as 'Today's mathematics', Chicago : Science Research Associates, 1964 ; and as 'Mathematics for today', Henley-on-Thames : Science Research Associates, 1968.
Today's mathematics : a guide to concepts and methods in elementary school mathematics by James W. Heddens. ISBN 057418600X. Published by Science Research Associates in 1974. Publication and catalogue information, links to buy online and reader comments.