I think this is much better as a relative pitch training tool for people with a very basic background in piano and music in general. I would have loved something like this back in high school to use for practicing over and over.

I think "teach" is a high bar, but I do think it's a good practice tool.

My one and only complaint is that sometimes the melodies it generates are tough to play back because they don't really sound like a real melody and I have to fight my brain telling me to play back the one that would actually sound good. Sort of like having to memorize a random string of words vs memorizing a normal sentence.