Winter Edition 2000 © 2000 TABLE OF CONTENTS

Intuitions and Undefined Operations: The Cases of Division by Zero Pessia Tsamir, Ruth Sheffer and Dina Tirosh

A Case of an Individuals Reluctance to Visualize Tom Lowrie

Elementary Mathematics: A Missing Piece in Secondary Mathematics Teacher Education Jeffrey Frykholm

Secondary Mathematics Teachers' Mathematics Autobiographies: Definitions of Mathematics and Beliefs about Mathematics Instructional Practice Gayle M. Millsaps

Does Early Acceleration of Advanced Students in Mathematics Pay Off? An Examination of Mathematics Participation in the Senior Grades Xin Ma