Building a strong foundation concerning whole number arithmetic in primary grades: editorial introduction

Building a strong foundation concerning whole number arithmetic in primary grades: editorial introduction / Bartolini Bussi, M.G., Xu Hua Sun, (NEW ICMI STUDIES SERIES). - In: Building the foundation: whole numbers in the primary grades: the 23rd ICMI study / [a cura di] Maria G. Bartolini Bussi; Xu Hua Sun. - Cham : Springer Nature, 2018. - ISBN 9783319635545. - pp. 3-18 [10.1007/978-3-319-63555-2_1]