A lot of people who run for school board are parents or teachers; 19-year-old Maryam Zafar is neither.

How a teen with an assault-style rifle walked into an unlocked Texas elementary school and stayed nearly an hour has emerged as a key question about the police response to the deadliest US school shooting in almost a decade.

In the aftermath of Columbine, Parkland, Sandy Hook and the nearly 1,000 other school shootings since 2012, advocates for nationwide gun control measures have run into political realities that have stopped these efforts from moving forward.

Tuesday's report comes from six K-12 audits conducted since 2016 and identifies five key risks that could undermine promising new efforts to boost student success.