GOP Gov. Gary Herbert already sparked controversy earlier this week by accusing Corroon of being a hypocrite because he sends his children to a private Catholic school while professing support for public education.
Now, the governor is saying Corroon's call for tougher graduation requirements would force students to give up elective arts classes and release time to attend religious instruction in The Church of Jesus Christ of Latter-day Saints.
"I don't know that everybody in Utah is going to think that's a good idea to give up art and seminary release time to have this more rigorous curriculum," Herbert said during the taping of his monthly news conference on KUED Channel 7.
Corroon, who recently unveiled a plan to improve public schools, said he supports allowing students to attend seminary during the school day, and that increasing the number of credits required for graduation from 18 to 22 would not prevent them from doing so.