I'm looking for references to schools in the sky. Was there a school that the Greek gods attended? A university frequented by the Norse pantheon? An academy in Tian? I'd love any pointers you've got.
Indo-European deities are generally considered all-knowing (there are exceptions, most commonly knowing the future). There would be little use for an Olympic or Asgardian academy.
It's very different in Buddhism, in particular in its Chinese form, because it blended with autochtone Chinese mythology. In "Journey to the West", the Jade Emperor and immortals like the Monkey King actually receive teaching in the Buddhist texts (usually from Quanyin), because they are (only) deities and not yet elightened. This is one of the most popular stories in China, even today, as shown below.