The challenges we face in mathematics education today can only be overcome through thoughtful and collaborative effort. This 2017 volume of Annual Perspectives in Mathematics Education (APME) focuses on collaborative initiatives that engage every level of the math education community, including practicing and preservice teachers, school administrators, teacher educators, and university mathematicians. The book's twenty-four chapters are grouped into five sections:Enhancing Mathematics Teaching from the Teacher's VoiceEnhancing Mathematics Teaching within Schools and DistrictsModels and...