Unfortunately, the mama was right. There's no requirement for a carseat after age 4 in my state:
(1)(a) Every operator of a motor vehicle as defined herein, while transporting a child in a motor vehicle operated on the roadways, streets, or highways of this state, shall, if the child is 5 years of age or younger, provide for protection of the child by properly using a crash-tested, federally approved child restraint device. For children aged through 3 years, such restraint device must be a separate carrier or a vehicle manufacturer's integrated child seat. For children aged 4 through 5 years, a separate carrier, an integrated child seat, or a seat belt may be used. bolding mine
We also don't have a back seat preference in FL, meaning a child at any age can sit up front.
Technically, this mama was not breaking the law. Her dd was not required to sit in the back or use a booster, and her seat belt was on, though not properly.
Of course I would ask the school about handing out literature. I wonder if we could have an officer go up and down the line at dismissal to talk to parents who are waiting (the first person usually shows up at least 40 min before the bell rings, so the cars are just sitting there; there'd be plenty of time).
Well, now, after looking over some of that awesome material in the link, I know what I want to do! I just recently became and executive member of the PTO. I'm going to email my prez to see if we can have a safety presentation at a monthly meeting. Maybe I can get a CPST to come speak about boosters and back seat riding, and then we can follow up with sending home a one page info sheet the next day.
Would you say Pre-K to 4th grade, or up to 5th? Obviously, we don't need to send info home with the junior high and high schoolers. LOL (Although my ds1 did use a booster until he was about to start 6th grade. He was always on the small side, so he used it until he was 11 going on 12. And then he wasn't allowed to ride up front until age 12.)