Vol. 1 Num. 1 (1981) David Wheeler Editorial2 Dick Tahta About geometry2 Caleb Gattegno The foundations of geometry10 Hendrik Radatz Students errors in the mathematical learning process: a survey16 John Trivett The multiplication table: to be memorized or mastered?21 Josef Albers Two cubes26 Joseph Agassi On mathematics education: the Lakatosian revolution27 Jack Easley Alternative research metaphors and the social context of mathematics teaching and learning32 Pearla Nesher The stereotyped nature of school word problems41 Peter Taylor On Virgil: my opening lecture to Mathematics 12049