enVision Math, Common Core, Teacher's Edition, Grade 4 Topic 11 Fraction Equivalence and Ordering

from the US Department of Education website describing the enVision program January 2013 "Program Description1 enVisionMATH, published by Pearson Education, Inc., is a core curriculum for students in kindergarten through grade 6. The program seeks to help students develop an understanding of math concepts through problem-based instruction, small-group interaction, and visual learning with a focus on reasoning and modeling. Differentiated instruction and ongoing assessment are used to meet the needs of students at all ability levels."