Sen. Wendy Davis is focusing on her education platform in a new ad in the race for governor. The 30-second spot, which starts airing this evening, focuses on Davis’ Senate voting record on school funding and standardized testing.

Davis also criticized Abbott for his role as Attorney General for defending the state’s school finance funding in state district court. Last week, a judge ruled that the way the state pays for its public education system is unconstitutional. The state attorney general’s office, led by Abbott, is appealing the decision.

This new ad is the first issue-based ad for Davis. The campaign’s previous commercials were aimed at attacking Abbott’s record as a former Texas Supreme Court judge and later, as attorney general.