Houghton Mifflin Harcourt On Core Mathematics Reseller Package Grade 3 Author:HOUGHTON MIFFLIN HARCOURT On Core Mathematics develops students' understanding of the Common Core State Standards for Mathematics in an interactive format. Each grade-level bundle includes a Student Worktext and Teacher Edition. Teacher Edition provides background information in each lesson, includes questioning strategies to prompt discussion and suggestion for differen... more »tiating instruction.« less