What's the Name of That Book??? discussion

Book where kids go to a certain school and get scouted by government agencies and this girl gets scouted by a super secret time travel organization. The members of the organization use different things for the secret names. Like gen1. Used Greek letters gen 2. Used numbers, and the current generation uses colors, they use necklaces to time travel and there is a special room that they time travel in because it soothes the effects time travel has on the body. Also the time travel is genetic. I probably read this book about 2-4 years ago

The Eighth Guardian by Meredith McCardle seems to match your description.

One Goodreads reviewer says, "This is a secret organization with fancy code names: First generation guards were given numbers, second generation guards were named after the Greek alphabet (Alpha, Beta...). ...third generation guards are named after...COLORS."

http://www.worldcat.org/advancedsearch > Keyword: school secret government | Subject: time travel | Juvenile | Fiction | Book | English

Yes!!!!!!! The eighth guardian

Great. Glad we could help, Kole.