USA Basketball announced Smart and the rest of the 24-man roster on Thursday.
The U18 team will be narrowed down to a 12-man roster by the USA Men's Junior National Team Committee following the training camp. The team then continue training for competition in the 2012 FIBA Americas U18 Championship from June 16-20 in Sao Sebastiao do Paraiso, Brazil.
Smart will give Travis Ford and his staff at OSU two players who have been invited to participate with USA Basketball. Co-Big 12 Freshman of the Year Le'Bryan Nash was selected to the 2010 Men's U18 National team, which won the gold medal at the FIBA Americas in San Antonio.
As if being invited to play for your country wasn't enough, Smart also reeled in a significant honor on Wednesday, as well.
Smart was a named an ESPNHS first-team All-American Elite Team member. He we was joined on the first team by UCLA commits Kyle Anderson and Shabazz Muhammed, future Kentucky Wildcat Nerlens Noel and unsigned small forward Jabari Parker.
Smart averaged 15.1 points, 9.2 rebounds and five assists per game in leading Marcus High School to a 39-2 record and it's second consecutive Texas 5A state title. Marcus High finished ranked No. 5 in the final national Powerade high school poll.