The problem is unless you really use the skill a lot you're not really gonna learn it from school. I had to teach myself how to read analog clocks in highschool cause even though I'm pretty sure I learned it in elementary school I grew up with computers and eventually smart phones so I never had to use it.
We had them too but at least for me in elementary school I didn't really care what time it was. I remember I knew what position on the clock meant school was done but other then that didn't really need to read it cause the teachers would just bring us as a class to whatever our next class was for that day. By the time I got old enough to start caring smartphones were prevalent enough that I never really needed to learn how to read a clock. It wasn't until highschool where teachers got more strict about enforcing no phones out in class that I then learned how to read clocks so I could know when class would be done.
In my elementary school we even had clocks, where the numbers were large dice the teacher could take out and rotate so they showed ½, 30 or 18 instead of 6, for example. It’s not hard to learn, if you’re at a school. But then again, digital clocks are so everpresent that it might not actually matter…
Did you not learn morse code in school...? I'm rather young and that was taught in one of my classes I'm fairly certain. Even if it was mainly for fun, and only really remembered how to do SoS