Most BCBA study plans divide the weeks evenly across the nine content sections. That feels fair and it is close to the worst thing you can do, because the sections are not close to evenly weighted.
Five sections carry 105 of the 175 scored items
Behavior Assessment, Ethical and Professional Issues, Measurement, Selecting and Implementing Interventions, and Personnel Supervision and Management. Add them up: 23 plus 22 plus 21 plus 20 plus 19 comes to 105 of the 175 scored items, or three fifths of your exam.
These are also the five that candidates consistently under-study, and the reason is worth naming. Concepts and Principles and Behavior-Change Procedures feel like the coursework. They are the material you were quizzed on in class, the vocabulary feels like the discipline, and studying them feels like studying. Supervision and Ethics feel like administration. So people drift toward the familiar two, which carry 49 items between them, and away from the five that carry 105.
The two smallest sections are genuinely small
Experimental Design carries 13 items and Behaviorism and Philosophical Foundations carries 8. Together that is 21 items, fewer than Behavior Assessment on its own. They are worth knowing and they are not worth three weeks. If you are still drilling the attitudes of science in week six, something has gone wrong with your allocation.
A better order
Do not start by picking a section. Start by finding out where you actually stand, then let the data pick for you. Take a weighted practice exam in your first week, score it by section, and weight each section's score against how many items it carries. A section where you scored 60 percent and which carries 23 items deserves attention long before a section where you scored 55 percent and which carries 8.
Then work the middle sections hardest, keep ethics on a weekly rotation rather than saving it for the end, and treat Design and Behaviorism as maintenance.
Our free 40 question mini exam exists for exactly this first step. It is weighted to the same proportions as the real exam, every item has a rationale, and it takes about forty minutes. When you know your weak sections, the full bundle has 370 items to drill them with.
More from the exam guides
- How many questions are on the BCBA exam, and how is it scored?
- The 2027 ABA code change: what happens on January 1
- The 2026 ASWB blueprint change: what actually changed
- How to turn your exam blueprint into a study plan
Watch free on YouTube:
An independent study aid. Not affiliated with, endorsed by, or sponsored by the BACB. BCBA and BACB are trademarks of the Behavior Analyst Certification Board.