Ten Weeks Below the Aimline: When to Change the Intervention

Work from the numbers rather than the adjectives.

• Baseline: 42 cwpm. Goal: 57 cwpm at week 10 - an implied slope of 1.5 words per week.
• Observed: roughly 44 to 50 across ten weeks, about 0.7 words per week.
• Against the aimline: every data point sits below the goal line, and the gap widens over time - she is growing, just not fast enough to close it.

Applying a standard progress-monitoring decision rule - four consecutive data points below the aimline, or a trend line meaningfully flatter than the goal line - the answer is change the intervention. Neither team member is right as stated: 'the intervention does not work' overclaims, because adequate implementation has not been verified, and 'ten more weeks' would waste instructional time while the gap grows.

The nuance worth stating in the meeting: the goal itself may have been ambitious. A 1.5 words-per-week target for a struggling fourth grader is at the upper end of typical growth; if the goal was unrealistic at the outset, part of the gap is a goal-setting problem, not a student problem. But even against realistic growth, the flat trend signals the plan needs adjustment.

Change is warranted only after ruling out the factors that would make the data untrustworthy or the intervention undelivered.

1. Measurement: were the passages equivalent in difficulty and at the right level? Who administered and scored them, at what time of day, and were directions and timing consistent? Alternate-form variability alone can produce several words of noise.
2. Fidelity: two checks in ten weeks is thin. Ninety-two percent on two observations does not establish that the program was delivered as designed across forty sessions. Increase the observation schedule before drawing conclusions.
3. Attendance and lost dosage: six absences translate to roughly six missed sessions out of about forty - 15% of the intervention. That is a real competing explanation worth documenting.
4. Intervention match: does the program target the actual deficit? If Rosa's core problem is decoding or vocabulary rather than fluency, a fluency-only program will produce exactly this shallow, slow trend.
5. Group size, minutes, and instructional level of the materials.

Have the team record its conclusion about each. If fidelity and attendance explain the flatness, the fix is to correct those and continue four to six weeks with more frequent checks - not to swap programs. If they do not explain it, the intervention itself is the target.

Change one thing at a time, so the team can tell what worked. Plausible options, chosen based on the verification above:

• Increase intensity (more minutes or days, smaller group).
• Change the program or the target skill (add decoding or vocabulary instruction if that is the actual deficit).
• Adjust the goal and aimline if the original 1.5 words-per-week target was not reasonable given baseline.
• If response remains inadequate despite documented fidelity, consider whether more intensive services or a different service delivery model are needed.

Documentation and communication:

• Graph the data with the aimline and the trend line; bring the graph to the meeting and give the parent a copy.
• Record the decision, the rationale, and the new progress-monitoring schedule in the meeting notes.
• If service minutes, program, or goals change, that is an IEP change requiring team action - an amendment or a meeting, with prior written notice to the parent - not a quiet classroom adjustment.
• Continue reporting Rosa's progress toward her goals at each reporting period, as the IEP requires.
• Set a specific review date (e.g., six weeks) with a pre-agreed decision rule, so the next conversation is driven by data rather than by whichever team member speaks first.