Students at Lawrence and Free State high schools would be going to class for seven periods instead of six periods next year, part of a tentative work contract negotiated between Lawrence school district administrators and teachers.

Also included in the renegotiated pact, the terms of which were released Friday evening: Nearly half of teachers in the district would get a pay increase beginning in March, and all teachers in elementary and high schools would see an increase in planning time.

In all, 464 teachers — those who have not reached the top of their pay scales — would see pay increases ranging from $250 to $700.

Elementary teachers would see their planning time increase by 10 percent, while teachers in high school would get another 11 minutes per week to plan — mostly by reducing the amount of time available during “late-start” days on Wednesdays.

The tentative agreement awaits approval Monday night by members of the Lawrence school board, and members of the Lawrence Education Association will vote — either to ratify or reject the terms — next week.

Frank Harwood, the district’s chief operations officer, said the salary increases would be expected to cost the district $180,000.

The changes in planning time at the elementary level could cost the district another $325,000, he said, but administrators are hopeful the costs could be made up through efficiencies gained by reconfiguring district schools.

Next year, the district plans to have elementary schools limited to students in kindergarten through fifth grade; middle schools for students in sixth, seventh and eighth grades; and high schools that now include freshmen.