Grouping Matrix

Really Great Reading's Grouping Matrix™ is a web-based, password protected, computer program that groups students in the middle of 1st grade through 12th grade according to the type and depth of their decoding abilities and weaknesses. The Grouping Matrix has direct on-line data entry, with immediately available reports that group students and recommend instruction.

The Grouping Matrix is complimentary, and a username and password is required to access the site. To obtain a complimentary username and password for your school or organization, email with your School Name or Organization, School District and State.

Videos and Support

To see a demonstration video of how to use the Year to Year Transition Tool to upgrade your students to the 2016/2017 school year, please click here and scroll to the bottom of the page.

To see a demonstration video of how to get started with the Grouping Matrix, please click here and click on the getting started video.

To see a demonstration video of how to use our "live assess" features, click here.

For all other support issue, write


Please enter your username and password in the form below.