Instant access to 200+ hours of FOCUSED STUDY NOTES from 15 essential chapters of the latest 9th edition textbook condensed into 28 pages. Challenge yourself with mock exams totaling over 270 HIGH-QUALITY QUESTIONS (more isn't better; CRCST has only 125 graded questions). Last but not least, gain exclusive access to our vibrant community forum, consisting of current students and recently certified techs in 2025!