<p>It’s probably been quite a while since your dad has done something like that, OP, so I’m assuming he’s forgotten. A lot of parents forget more of the basics as they age, from my experiences. I mean, my stepdad is a psychiatrist, and he knows basically a ton of stuff in psychiatry, and he’s probably one of the leading psychiatrists in my region, but I remember I asked him for help with math when I was in like 5th or 6th grade, and he stared at the work blankly for like ten minutes and passed it off to my mom, who hired a tutor to teach me. My mom, on the other hand, didn’t really have parents who pushed her to be academically inclined, so she got a BA and basically got married to my biological father afterwards. I think that she’s very intelligent in practical ways; when we came to the US after she divorced my father, she taught herself English and figured out a bunch of stuff about the system here and whatnot.</p>