Participation in the academic program many credit with spurring a turnaround at Seattle's long-troubled Rainier Beach High School continues to increase. This spring, more students will be taking the year-end exams attached to the rigorous college prep curriculum — the International Baccalaurate, or "I.B." — that Rainier Beach first began offering in 2013. More students are also pursuing the I.B. Diploma, a credential many colleges recognize.