Math Expressions workbooks can be purchased from the Houghton Mifflin Hartcourt website, which is the company responsible for the books, and from Amazon These workbooks are designed for students in kindergarten through fifth grade.
The Houghton Mifflin Harcourt website has an online store that sells these workbooks in its elementary mathematics section. There's also the option to see a sample before purchasing.
Amazon offers the workbooks in its book section, and users can search for Math Expressions workbooks to see the selection.
Math Expressions workbooks are geared toward Common Core State Standards and support differentiation so that students of various learning styles can learn, notes Houghton Mifflin Harcourt. Along with the workbooks are mobile apps that feature hands-on math activities.