Cathode Ray Tube
I learned everything I needed to know about race by going to public school in Wilmington DE.
I guess I’m old but to me CRT means Cathode Ray Tube.
I went to a poor southern school for high school. It had many blacks. Out of all the blacks, maybe 5% went to class. The rest stood around in the hallways and stood outside smoking. That was Socastee high school in Myrtle Beach in the 1970’s.
At the time, Conway had built a really nice and expensive school for the blacks in UCLA (Upper Conway, Lower Anor). They tore the place apart in 2 years. It was trashed with cut seats, broken windows, and graffiti. Same thing: The blacks hung out instead of going to class.