A new law requires students to be taught the contributions of gay, lesbian, bisexual and transgender people, but opponents have been fighting to repeal it through a ballot measure.
They've been circulating a petition, mainly at churches, in hopes of getting a measure on the 2014 ballot. But the deadline to get about a half-million signatures was Monday, and they came up about 60,000 short.
Senate Bill 48 took effect in January, but most school districts have not implemented it.
The Associated Press contributed to this report.