Except for "... and the reaction by all law enforcement." The school resource officer is also law enforcement, not a school employee, and he was the only one who arrived in time to help tidy up any "containing." The only reacting and containing "all" [other] law enforcement did was to show up after the fact and mill around, looking official.
You're reading too much into the innocuous, boilerplate formality of thanking first responders, and saying everyone did a wonderful job, which is what they always say in these situations. If they neglected to mention the teacher at all, there might be some ground for complaint. But they both singled her out for praise.
Besides, the "milling around" probably also included checking for other threats (like those other shooters that always seem to be rumored about), getting medics to the people who needed them, maybe even police personally rendering first aid. Also, keep in mind that the teacher was wrestling with an armed, teen-aged male. For all we know, from our safe distance, she may have desperately needed the help of the resource officer.