I think I saw an easter egg.

There's another HBO movie called The Wizard of Lies, about Bernie and Ruth Madoff. Released in 2017, but who knows when it was filmed. Point is, in Bad Education, when Rachel goes to check out the Park Avenue address, outside the building she goes into, a doorman is trying to hail a cab. Next to him is a woman with flyaway gray hair and horn-rimmed eyeglasses. Looks *very* much like Michelle Pfieffer as Ruth Madoff in the other film! It wouldn't even have to be Michelle Pfieffer, just someone with the same wig and glasses. Anyway, I choose to see it as an easter egg.