All your missed questions are saved
automatically for extra practice.
It's a practice test that's automatically made up of all your missed questions. Once you finish this test, you’ll be able to revisit your Challenge Bank™ to practice and sharpen your skills.
View All PlansAdding difficult questions to Challenge Bank™ is an exclusive Premium feature. Unlock access to 650+ exam-like questions, a Pass Guarantee, personalized study plans, and more.
View All Plans| 90-100 | => | 45% |
| 80-89 | => | 34% |
| 70-79 | => | 15% |
| 60-69 | => | 6% |
| <60% | => | 0% |
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 December 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.)
M.S., Chief Educational Researcher (ACES member)
Last verified for accuracy on
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.
Driver’s Ed is - nobody wants to set foot inside the DMV. That’s why millions of learners trust us for simple, visual, effective prep.
We are an officially recognized FMCSA Entry-Level Driver Training provider and a proud partner to over 2,500 libraries. We work with safety organizations like GHSA and the National Safety Council to help create safer roads for everyone.
Our trademarked system automatically saves questions you miss, creating personalized tests that target your weak spots until you’ve mastered the material.
Get smarter as you study. Our new AI-powered feedback provides detailed, question-level insights to help you understand the why behind each answer.
Go beyond the boring black-and-white manual. Our interactive handbook lets you read, listen with an MP3 audio version, or even chat with it to find the information you need, faster.
We build our practice questions from the current 2025 ID Driver Handbook and refine them using patterns recent test‑takers report.
Driver handbook • Knowledge‑test/permit overview • Fees & ID requirements • Office/appointment info
We mirror recurring themes (e.g., right‑of‑way traps, sign look‑alikes) and use similar distractors and wording styles.
We don’t collect or publish actual test items and we’re not affiliated with DMV.
