Texas Gov. Greg Abbott unveiled a slate of policy and legislative changes to keep schools safe.

The School and Firearm Safety Action Plan contains 40 proposals and recommendations, including more law enforcement at schools, mental health evaluations for students at risk of harming others and improvements to campus security programs.

"This plan is a starting point, not an ending place," Abbott said in a statement. "It provides strategies that can be used before the next school year begins to keep our students safe when they return to school. This plan will make our schools safer and our communities safer."

His plan calls for more school marshals and for active shooter and emergency response training.

To prevent threats, Abbott recommends schools be provided with more mental health training and behavioral threat assessment programs.

The plan calls for a zero-tolerance policy for students who commit assault and an expansion of the list of offenses for which a student can be expelled or placed in disciplinary programs.

He also wants a mandate requiring any changes that might affect a person's ability to legally purchase or possess a firearm to be reported to authorities within 48 hours.