GREEN BAY, Wis. (AP) -

The Green Bay School District plans to buy 5,000 laptops for students in four different grades, representing a $2.5 million investment.

A Press-Gazette Media report says the computers will be used in math and language arts classes for grades 6, 7, 9 and 10. They'll also replace older equipment in some elementary schools.

Students will use the Chromebook computers in school but won't be allowed to take them home.

This isn't the first time the district has invested heavily in technology. Officials bought about 900 smaller laptops in 2012 for students in sixth and ninth grade classes.

The latest purchase frees the smaller laptops for checkout, for students who don't have computers at home.

Diane Doersch is the district's chief technology officer. She says devices are important, but good teaching is still the best "app."