The State Board of Education has given preliminary approval to new rules requiring high school students take four years of classes in both math and science.
The board Wednesday approved adding a year to the current minimum requirement of three years in both subjects.
The new curriculum will first apply to next year's freshmen.
The 15-member elected board is responsible for crafting guidelines to implement a new state law adding the fourth year.
It's part of a sweeping education reform bill the Legislature approved during a special session on school finance earlier this year.
The board had already agreed to increase the credits needed for graduation to 26 from 24 in order to keep the new courses from cutting into student electives.
The board is expected to take a final vote on the rules Friday.