Darned near everything I see nowadays reminds me of vignettes of the past, oftentimes many different memories of things related to the current scene. Just a couple of minutes ago, someone mentioned Punnett Squares and reminded me that, though we covered their use in 7th Grade Science class, they were missing from my sophomore high school biology class. . . in a different state and district (as was a LOT of the human anatomy covered in an 8th Grade Science class in that other district).
Yeh, when we moved (9th Grade), the schools placed me in “average kids'” classes, in order to make absolutely sure I was bored out of my gourd.