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View All PlansFree ID CDL School Bus Endorsement Practice Test 2025
Welcome to our Idaho CDL School Bus Endorsement Practice Test, an intuitive tool designed to prepare you for this career path. It is available online, 24/7, so you can use it anytime, anywhere in the world. There are 20 multiple-choice questions based on the Idaho Commercial Driver’s License Manual (Idaho CDL Handbook 2025), an official resource published by the Department of Motor Vehicles (DMV).
Unlike other practice tests that only reveal your score at the end, ours updates in real time, giving you insight into your performance. If you make a mistake, we will point it out as soon as it occurs and provide a detailed explanation that helps you understand the reasoning behind the correct answer. Please pay attention to this feedback and proceed to the next question only after you understand why your answer was incorrect. For future reference, we recommend noting this feedback in a notebook or notebook app so you can revisit the material during your practice sessions.
Accuracy is important when studying commercial driving theory. We regularly update this practice test (most recently for October 2025) to reflect the latest changes brought by DMV rules or state law. (Aspiring school bus drivers should still check the official ID DMV website for the most up-to-date information.)
Digital eye strain is a common problem during long study sessions, often caused by staring at a screen without taking regular breaks. To reduce discomfort, try lowering your screen brightness and setting reminders to take frequent breaks from studying. If you have difficulty reading the text, open the test settings menu and use the slider to increase the font size. Make the text bigger until you can read the questions and answer choices comfortably.
Start today and dedicate the following days to studying the basic aspects of commercial driving theory. The official commercial driver’s license manual will teach you about pre-trip inspections, the air braking system, and the safe operation of school buses. Use this resource alongside our Idaho CDL School Bus Endorsement Practice Test to boost your learning potential and ace the official school bus written knowledge exam on your first attempt.
Authored and curated by Steven Litvintchouk, M.S.
Chief Educational Researcher (ACES member)
Methodology & Editorial Policy
Last verified for accuracy: October 2025 (reviewed weekly)
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