Two-way bilingual immersion programs have been shown to create higher-achieving and more confident students compared to other programs. Academically, TWBI students receive higher grades due to learning two languages and being exposed to different cultures. Research also shows that 87-93% of past TWBI students stated they would not drop out of school. TWBI programs start in kindergarten and go through 8th grade to ensure students have sufficient time to become fully bilingual and continue language studies in high school. There are two models, 90:10 and 50:50, with research showing 90:10 students tend to score higher and be more fully bilingual.