@UnicornzviThere's a series known as the El Donsaii series on the big river site. 18 books to this point. The MC is female, a genius and also has synapses that make her a great athlete. She's 15 at the start, but grows up over time. Has a son and then twin girls, who are also super geniuses. I think it's a good read (very si-fi'ish), but 18 books make it a long read as well, and given the site, it costs some.
The same author has other series involving genius types, some being older, but also a couple of series where kids and young adults develop special powers: telepathy, telekinesis, ability to stop time, etc. Also one "prehistoric" series involving a young teen who winds up inventing a lot of things we now take for granted.