Developing Essential Understanding of Ratios, Proportions, and Proportional Reasoning in Grades 6-8 Lobato Joanne Heftet / 2010 / Engelsk
Developing Essential Understanding of Geometry for Teaching Mathematics in Grades 9-12 Sinclair Nathalie Heftet / 2012 / Engelsk
Developing Essential Understanding of Geometry for Teaching Mathematics in Grades 6-8 Sinclair Nathalie Heftet / 2012 / Engelsk
Developing Essential Understanding - Rational Numbers in Grades 3-5 Clarke Carne Heftet / 2010 / Engelsk
Developing Essential Understanding of Number and Numeration in Pre-K-Grade 2 Dougherty, Barbara Heftet / 2010 / Engelsk
Facilitator's Guidebook for Use of Mathematics Situations in Professional Learning Zbiek, Rose Mary Heftet / 2017 / Engelsk
Facilitator's Guidebook for Use of Mathematics Situations in Professional Learning Zbiek, Rose Mary Innbundet / 2017 / Engelsk
Developing Essential Understanding - Multiplication and Division for Teaching Math in Grades 3-5 Otto, Albert Heftet / 2011 / Engelsk
