TOPEKA ? Gov. Kathleen Sebelius today signed into law the three-year, $466 million school finance bill.

Sebelius called the measure an “historic committment.”

Now it will be up to the Kansas Supreme Court to determine if it is constitutional.

Last year, the court ruled the school finance system underfunded all students, especially those with lots of low-income students.

The court accepted a $290 million increase in the $3 billion system as a down payment on what an education cost-study said would be needed in additional funds.

That study, conducted by the Legislative Division of Post Audit, recommended a $400 million increase in one year.

Alan Rupe, an attorney representing low-income districts that successfully sued the state, said he will ask the court to reject the plan signed by Sebelius.

Sebelius said the funding measure makes a “good-faith effort to follow the guidelines of the legislative cost study.”

She said she was disappointed the bill did not allow local communities more leverage to enhance school spending, and that it didn’t require all-day kindergarten.

But overall, she said, it will help improve schools statewide.