Autism Spectrum Disorders (ASD) programs have spread rapidly all over Saudi Arabia in recent years. A number of teachers have been provided to teach students with ASD to improve their academic, communication, social, and behavioral skills. The main purpose of this study was to investigate teachers’ knowledge on Evidence Based Practices (EBP) for individuals with ASD. The second purpose was to ensure the study was designed to meet the standards for quality survey research. A survey was used to meet the first purpose and a methodological review was used to meet the second purpose. The results indicated that the teachers of students with ASD in Saudi Arabia had low to moderate knowledge of EBP on communication, social and behavioral skills to improve those skills in students with ASD. Implications from this study indicate that the Ministry of Education may provide more training on EBP for in-services teachers, and to improve teacher preparation programs at universities to better prepare pre-service teachers on EBP for ASD students.