You can access lessons for Go Math! by sampling or purchasing the program from Houghton Mifflin Harcourt. Go to the Houghton Mifflin Harcourt website by typing Hmhco.com into your address bar.
Once you are on the website, click on the Classroom tab on the homepage. On the classroom page, you can locate the Go Math! program by clicking on either the Shop By Grade or Shop By Subject tabs. Click on the appropriate grade level or subject and scroll through the hits until you come to Go Math! Houghton Mifflin Harcourt allows you to sample lessons before purchase. To do this, click on the Sample Now button and follow the instructions.