ABSTRACT The goal of this 3 year Fast-Track STTR is to develop and evaluate a multi-level (youth, parent, school) Internet-based dating violence (DV) prevention program, ‘Me & You-Tech’ (MYT) for 6th--grade middle school students. By 6th grade, approximately 50% of students will have engaged in a dating relationship. Of these, almost one-third will have perpetrated physical DV and almost two-thirds will have perpetrated emotional DV. Youth exposed to DV are more likely to perform poorly in school, experience difficulties in future relationships, participate in adult violence, and experience depression, suicidal ideation, bullying, substance use, and risky sexual behavior. Many U.S. states are required by law to provide DV education. However, youth exposure to DV education, in particular, effective programs, is minimal and the few programs available are confronted with challenges of school-based barriers to fidelity, training, and resources. The study comprises 2 phases and 10 specific aims: Phase 1: Develop the theoretically- and empirically- based MYT prototype and test feasibility (Mos.1-12). Phase 1 Specific Aims: 1.1 Conduct a content analysis of existing Me & You and SSS intervention matrices to identify required core content, methods, and strategies for MYT design (youth-, parent-, and school-level components); 1.2 Conduct review of MYT concepts and wireframes to test acceptability and perceived feasibility for use in the context of the school by School, Youth, and Parent Advisory Groups to inform MYT design (youth, parent-, and school-level components); 1.3 Develop MYT design documents and develop the prototype including alpha testing; 1.4 Test usability of MYT prototype; 1.5 Evaluate (pilot-test) the MYT prototype for feasibility and perceived value in school and home settings and review with distribution collaborator (ETR Inc.) for optimal specifications for dissemination; 1.6 Disseminate Phase 1 findings (Phase 1 report and peer reviewed publications). Phase 2: Develop MYT informed from Phase 1 and conduct a RCT to evaluate impact of MYT (Mos. 13-36). Phase 2 Specific Aims: 2.1 Revise MYT design documents (based on Phase 1 data) and obtain advisory group sign-off; 2.2 Develop the full theoretically- and empirically-based MYT program; 2.3 Test full MYT program functionality and content (alpha test), and usability; 2.4 Conduct a RCT of MYT 6th- grade students (n=300) in 4 Houston middle schools; 2.5 Review MYT distribution plans with collaborator ETR Inc.; 2.6 Disseminate Phase 2 findings of Phase 2 report and peer reviewed publications. The 3 primary hypotheses are: Compared to those not receiving MYT, youth who access MYT will demonstrate significantly: 1. Reduced DV (emotional, physical, or sexual) perpetration; 2. Reduced DV (emotional, physical, or sexual) victimization; and 3. Improved psychosocial determinants related to healthy/unhealthy dating relationships (e.g., knowledge, skills, self-efficacy, attitudes and norms, gender role...