AlphaStar offers Turing Master Class free but by invitation only. The first class is on Sunday, September 24th. This class aims to prepare individuals and teams for prestigious high school computer science competitions such as USACO National Camp, VTU High School Programming Contest, Codeforces, TopCoder, and Stanford ProCo. Minimum requirement for the course is to currently compete in USACO Platinum division. Click for more information and registration.