User blog comment:AmyRose14/Sonic High/@comment-3486042-20110515225054/@comment-115265-20110515233438

In the first place, you don't even have to be "uber-smart" to get into High School.

Most High Schoolers I know personally can't even read some words they should have been able to read.

Plus, intelligence is relative. As you pointed out, Tails' field is technology. Technology being an extremely tough subject for many people, I should think that knowing as much about it as he does warrants an "uber-smart" in that field. And he probably does very high-level mathematics, which is key in the development of new technology, which is what he does for a living, aside from defeating Eggman with Sonic.

He can't be "uber-smart" about every single thing. That's not possible unless you're a God.