Volume 15, Number 3 (July 2018)
“Leadership does not depend on being right." - Ivan Illich (1926-2002)
Editorial
Editorial: Towards 2020
Bharath Sriraman
Articles
Teaching Calculus with Infinitesimals: New Perspectives
Luz Marina Hernandez and Jorge M. Lopez Fernandez
Justifying Euler's formula through motion in a plane
Marek Svetlik, Marija Radojicic, Slavisa Radovic, and Ksenija Simic-Muller
Nine lines are needed to avoid any three general points
Roy Mikael Skjelnes
Dividing an Apple into Equal Parts – An Easy Job?
Hans Humenberger
Generating k-Pell Infinite Series Using Whittaker’s Formula
Raul Prisacariu
Functional Reasoning and working with Functions: Functions/mappings in mathematics teaching tradition in Hungary and Germany
Gabriella Ambrus, Andreas Filler, and Odon Vancso
Visualizing Complex Roots
William Bauldry, Michael J. Bosse, and Steven Otey
Two notions of ‘linear function’ in lower secondary school and missed opportunities for students’ first meeting with functions
Dyana Wijayanti
Understanding Teacher Noticing of Students’ Prior Knowledge: Challenges and Possibilities
Gloriana Gonzalez
Locating Complex Roots of Quintic Polynomials
Michael J. Bosse, William Bauldry, and Steven Otey
Mathematics Teachers’ Teaching Practices in Relation to Textbooks: Exploring Praxeologies
Anna Pansell and Lisa Bjorklund Boistrup
Drawing off the page: How new 3D technologies provide insight into cognitive and pedagogical assumptions about mathematics
Oi-Lam Ng, Nathalie Sinclair, and Brent Davis
