1.3 Blocks, Breaks, and Navigation

Why navigation rules matter

The CHES exam is not one long list with unlimited backtracking. The current structure is Block 1 = questions 1–83, then an optional 10-minute break, then the later block = questions 84–165. Critically, once the later block begins, you cannot return to Block 1. That makes the end of Block 1 a hard decision point, not a casual pause.

Your plan must protect review time before you leave Block 1. If you rush forward with blank or randomly marked first-block items, that score is locked. If you over-polish every uncertain Block 1 item, you compress the time available for questions 84–165. The right behavior is deliberate closure: answer, review marked items, commit the rest, then move on.

Two-block workflow

Treat each block as its own mini-exam with its own pacing budget.

At the start of a block, move at a steady pace and mark only items where a second look is likely to help. Avoid marking every mildly uncertain item; an oversized review list makes you second-guess sound answers and burns clock you do not have.

End-of-block review order

At the close of Block 1, review marked items in priority order:

1. Items with no answer selected — these can only hurt you; commit a best guess to every one.
2. Items narrowed to two options — reread the exact task in the stem and pick the option that matches the program stage.
3. Items you only wanted to reassure yourself about — change an answer only with a concrete reason, not a vague feeling.

Once the block is closed, mentally release it. The later block needs full attention, and ruminating on a locked block cannot raise the score.

Using the optional break wisely

The optional 10-minute break can reset attention, reduce eye strain, and mark a clean transition between blocks — but it is counted inside your 3-hour total, so it is real time spent. Practice both ways: one full timed set with a short reset and one without, then decide in advance what conditions justify the break (for example, if you are clearly fatigued or ahead of pace). A good break is structured: stand, breathe, use the restroom if permitted, and return ready to execute. It is not a time to replay hard Block 1 items, which are now locked.

Marking and guessing

There is no penalty for guessing, so every item must have a selected answer before you leave a block. A good guess is not panic. Start by eliminating options that are too early, too late, outside the health education role, inconsistent with ethics, or unsupported by the scenario. When two choices remain, ask which best matches the precise verb in the stem:

• "First step" → assessment or stakeholder engagement often beats implementation.
• "Measure success" → an evaluation aligned to the objective beats a communication tactic.
• "Professional conduct" → confidentiality and scope of practice usually control.

The navigation rule raises the stakes, but the reasoning process is unchanged.

A concrete time budget

Numbers turn the navigation rule into a plan. Suppose you take the optional break; that leaves about 170 minutes of question time. Split it roughly evenly so neither block starves the other.

If you reach question 83 with more than 95 minutes already gone, you are behind and should speed your first pass through the later block, marking fewer items. If you arrive at the Block 1 close with time to spare, spend it there — that time cannot be carried into the later block in a way that reopens Block 1, so unused Block 1 review is simply lost.

Decision rules when two options remain

• If the stem says "first" or "before," prefer the earlier program-cycle action (assessment over implementation).
• If it says "most appropriate" for a defined population, prefer the culturally responsive, evidence-based option over the most elaborate one.
• If it raises a participant's privacy, prefer the option protecting confidentiality even when another option is faster.
• If two options are both defensible, prefer the one an entry-level specialist could actually carry out without clinical or policymaking authority.

These rules let you commit a defensible answer in seconds rather than re-reading the stem a fourth time, which matters most precisely when the clock and the irreversible block boundary are pressing on you.

Scenario review checklist

• Identify the relevant CHES Area of Responsibility.
• Locate the program stage described in the scenario.
• Match the answer to evidence, stakeholders, and ethics.
• Reject choices that are premature, unsupported, or outside the entry-level role.