SAYO-S&T is one of three research-based measurement tools that make up the APAS System, a field-tested, user-friendly suite of assessment tools built with OST in mind. Use the SAYO-S&T survey to measure any of the eight youth outcome areas that are scientifically linked to long-term positive youth development and academic and life success. SAYO-S&T is flexible -- it can be tailored to measure the specific youth outcomes that are linked to your program goals: Behavior in the Program/Classroom, Initiative, Engagement in Learning, Relations with Adults, Relations with Peers, Problem-Solving, Communication, Critical Thinking, Perseverance, Self-Regulation, Leadership, Homework, Academic Performance. (author abstract)