STI is the only place to go !!! The best Teachers, and staff to help you with all your smog related learning needs. Whether your just starting your quest, or are a seasoned technician going for updates, You couldn't find a better school. Their experience and knowledge in the automotive industries is very extensive. Their Books are great, (I understand they are exclusive to their school) and a very knowledge packed easy read. Even have an online resource commissioned with Pearson - Mylab & Mastering which was an amazing learning benefit to me. I won't go anywhere else !! MUCH LOVE for STI !!!!