Vol. 11 Num. 3 (1991) Shmuel Avital , Edward J. Barbeau Intuitively misconceived solutions to problems2 Janet Duffin , Adrian Simpson Interacting reflections on a young pupil's work10 C. Alsina , E. Trillas Fuzzy sets and mathematics education16 John Monaghan Problems with the language of limits20 Christopher Ormell How ordinary meaning underpins the meaning of mathematics25 Sandra K. Wilcox , Pamela Schram , Glenda Lappan , Perry Lanier The role of a learning community in changing preservice teachers' knowledge and beliefs about mathematics education31 Rosamund Sutherland Some unanswered research questions on the teaching and learning of algebra40