Copyright Year: 2011, 1st Edition. Dimensions: 8.4 x 10.8 inches. This 5th grade set includes Volume 1 and Volume 2 of the consumable Student Activity Books for Houghton Mifflin Math Expressions. The Student Activity Books are designed to help 5th grade math students link mathematical ideas to everyday experiences. These consumable books provide interactive lessons that focus on concept development, problem solving, and practice; plus real world scenarios to keep students interested and engaged. Publisher: Houghton Mifflin Harcourt.