Arizona is making national headlines over an apparent attempt by Republican School Superintendent Diane Douglas to roll back the teaching of evolution in public schools.

On this weekend’s “Sunday Square Off,” we hear from a leading science educator, Barbara Reinert of the Scottsdale Unified School District, who says the removal of the word “evolution” from Arizona’s science standards could block its teaching in schools.

Reinert also gives us the inside story on how this controversy developed.

Also on “Square Off”:

-It’s one of Arizona’s most significant political corruption trials in years: Former Republican state regulator Gary Pierce is charged with trading his votes for a payoff from a controversial water company owner, George Johnson of Johnson Utilities. Arizona Capitol Times reporter Katie Campbell breaks down the trial, which started last week.

-Democratic political consultant Lisa Fernandez and Republican consultant Chris Baker try to make sense of several puzzling storylines in the new election season:

A Republican candidate for governor is running against the McCain family.

Expelled state lawmaker Don Shooter wants his seat back, as he prepares to sue the taxpayers who might vote for him.

A Paradise Valley Republican legislator has enlisted her ear-nose-and-throat-doctor husband to take on a fellow Republican in a settling of scores that could cost the GOP two seats at the Capitol.

“Sunday Square Off” airs at 8 a.m. Sundays on 12 News, after “Meet the Press.”

How Diane Douglas tinkered with evolution

See video above.

A leading Arizona science educator explains how Republican School Superintendent Diane Douglas is attempting to roll back the teaching of evolution in Arizona classrooms.

Inside Arizona’s biggest political corruption trial in years

Arizona Capitol Times reporter Katie Campbell breaks down the bribery charges against former Republican state regulator Gary Pierce and water company owner George Johnson of Johnson Utilities.

Ken Bennett is running against Doug Ducey. So why is he attacking the McCains?

It’s one of several weird storylines in Arizona’s election season: Why is Republican Ken Bennett attacking John and Cindy McCain in his run against Gov. Doug Ducey?

Why Don Shooter could win and Maria Syms could lose

Expelled GOP lawmaker Don Shooter wants his seat back. Republican legislator Maria Sym and her doctor husband are settling scores with fellow Republicans in her legislative district. Why Shooter could win and Syms could lose.