Vol. 35 Num. 3 (2015) Catherine (Katy) Ulrich Stages in constructing and coordinating units additively and multiplicatively (Part 1) ABSTRACT 2 David Yopp , Rob Ely , Jennifer Johnson-Leung Generic example proving criteria for all ABSTRACT 8 Thomas Kieren A. J. (Sandy) Dawson (1940–2015): What I learned with Sandy Dawson14 Ubiratan D'Ambrosio A. J. (Sandy) Dawson (1940–2015): I learned from Sandy15 Sandy Dawson Learning mathematics does not (necessarily) mean constructing the right knowledge ABSTRACT 17 Alfino Flores Communication: The voices and the echoes23 Jérôme Proulx Communication: Mathematics education research as study25 Gareth Lewis Motivational classroom climate for learning mathematics: a reversal theory perspective ABSTRACT 29 Vince Geiger , Rudolf Straesser The challenge of publication for English non-dominant-language authors in mathematics education ABSTRACT MORE INFORMATION 35 - Contributor affiliations and contact information44