This study's purpose was to explore effectiveness of alternate format in-service delivery for what teachers needed to know to effectively teach their students with Autism Spectrum Disorder/High Functioning Autism/Asperger Syndrome (ASD/HFA/AS) in the general education setting. The study's research questions included: Did participants learn information they needed as well using asynchronous online in-service format models as when in a traditional face-to-face consultative approach? Did the use of a broad asynchronous online discussion approach to collaboration result in effective student problem-solving for the participants? Did participant attitudes change toward online instruction as a means of collaboration as a result of engaging in alternate in-service delivery models? A fifteen-hour staff development course was developed and taught to 24 teacher/educators in a suburban southwest K-12 public school district. The course content was organized around topics derived from an earlier data collection and included what teachers said they needed to know, from whom, and how. A free, simple asynchronous online environment was created for the course and online participation for learning and collaboration activities was requested of two participant groups, hybrid or online. Quantitative data was collected from Pre-/Post-Tests and survey. Qualitative data was collected from weekly collaborative problem-solving reflections. Results indicated that educators improved knowledge base in ASD/HFA/AS characteristics and adaptations and found collaborative online problem-solving about students effective and personally satisfactory. Results for online participants during the alternate format delivery sessions of the course were stronger than hybrid format although both appeared to profit from the use of technology. All participants changed their view to positively value asynchronous online formats for learning and collaborating with other teachers to find out what they needed to know to implement in the classroom in efficient and economical ways.