Arizona and Indiana have signed on to use the Colorado Growth Model for monitoring student achievement.

Colorado Department of Education officials said the states signed formal agreements to use the online data tool that measures individual student and group progress from year to year.

The goal of the program is to implement a single system nationwide. Enhancements to the growth model and display tools would be shared among the collaborating states.

Massachusetts has adopted some of the methodologies of the model, and the CDE expects other states to follow suit.

“This collaboration illustrates our common goal of shaping the national conversation about what’s needed to ensure schools increase rates of academic success for all students,” said Education Commissioner Dwight Jones.