Personally, I don't know that he did, but I do know that when the Interstate 635 "Loop" was named LBJ Freeway, folks in other parts of the country seized on that to say, "see? they make him [LBJ] a hero. they all hate JFK down there in bad 'ol Dallas..." or worse.
Schoolkids of that day didn't cheer. That is total horse-droppings, period. Conventional culture was far more polite then, than it is now. Along with there being one hellava lot more registered Democrats per percentage of population there in Dallas-Ft.Worth, than there is today, or so I get the impression.
All this stuff about schoolkids being happy about the Presidential assassination in '63 is less true [even!] than Jared the crazy-red-thong posing whack-job being influenced by Sara Palin (of all people, sheeshs) to go shoot people.
Meaning, it is utter & complete fabrication.
Just finished Basic Training when the Cuban Mille Crisis came along. Was later stationed in SoCal then and after having to “Standby” for hours on-end in the hot sun at Palm Springs while JFK and Jackie meandered around did bring out a cheer from me when hearing the news.
He was a pompass ass who almost got us all nuked. Piss on him and every kennedy.