Missouri IEP Data Collection and Baselines: What Parents Need to Know

The IEP document handed to you at the end of a meeting is only as useful as the data underneath it. Missouri's special education regulations require that IEPs be built on objective, current data — not impressions, not teacher estimates, and not last year's evaluation numbers. When baseline data is missing, vague, or fabricated, the entire IEP collapses: you cannot measure whether goals are being met, you cannot prove regression, and you cannot build an evidence-based case for services.

Here is what Missouri law requires, what weak data looks like in practice, and how to use baseline data as a parent advocacy tool.

The PLAAFP: Where Baselines Live

The Present Level of Academic Achievement and Functional Performance (PLAAFP) is the foundation of every Missouri IEP. DESE's compliance standards require that the PLAAFP:

• Include current, objective data establishing the student's baseline performance in every area of need
• Identify how the disability affects involvement and progress in the general education curriculum
• Flow directly into the annual goals — there should be a clear, logical connection between what the PLAAFP says about a student's current level and what the goals are asking the student to achieve

"Current" means data gathered recently enough to reflect where the student is now, not where they were at a previous evaluation. An IEP written in October cannot legitimately use evaluation data from three years ago as the baseline for this year's goals.

The PLAAFP baseline is what the annual goal grows from. If the PLAAFP states that a student reads at 45 words per minute, an annual goal of "student will read 75 words per minute" establishes a measurable, data-anchored target. Without the baseline number, "student will improve reading fluency" is an unenforceable aspiration.

What Good Baseline Data Looks Like

For academic skills:

• Specific performance scores from curriculum-based measurement (CBM) or standardized assessments: reading rate, accuracy percentage, math computation fluency, writing output measures
• Dated assessment results showing current performance, not evaluation data more than 6-12 months old
• Identification of the assessment tool and conditions (e.g., "Oral Reading Fluency probe, 1-minute timing, October 2025: 45 correct words per minute")

For behavioral goals:

• Frequency data: how many times per day/week a behavior occurs
• Duration data: how long behaviors last on average
• Intensity ratings if applicable
• The observation period, context, and who collected the data

For functional and adaptive skills:

• Performance on standardized adaptive behavior scales
• Teacher observations across specific environments tied to skill domains
• Parent observations of skill performance at home and in community settings

What Weak Baseline Data Looks Like (and Why It Matters)

Many Missouri IEPs arrive at the meeting table with PLAAFP statements that read like this:

"Student struggles with reading comprehension." "Student exhibits behavioral challenges in unstructured settings." "Student has difficulty completing multi-step math problems."

These are not baselines. They are narrative observations. They establish no measurable starting point, which means:

• Annual goals written off these statements cannot be verified — "student will improve reading comprehension" from an undefined baseline is not meaningful
• You cannot identify whether progress is occurring because there is nothing to compare current performance against
• At the annual review, the district can claim any degree of progress because the starting point was never defined
• In a due process dispute, the absence of objective baseline data is a significant compliance deficiency

When you receive a draft IEP before a meeting, review every PLAAFP statement and ask yourself: could I plot this on a graph? If the answer is no, the baseline is insufficient.

How to Push Back on Missing Baselines

At the meeting: Ask directly for the specific data supporting each PLAAFP statement. For every area of need, you want: the assessment tool, the date, the specific score or observation count, and who administered or collected it. "Johnny is reading below grade level" does not answer those questions. "Johnny scored at the 18th percentile on the WIAT-4 Reading Comprehension subtest administered October 12, 2025" does.

In writing before the meeting: If you've received a draft IEP, send written questions to the special education coordinator asking for the specific data sources underlying each PLAAFP statement. Getting these questions on record demonstrates that you reviewed the draft and identified data gaps.

Request the data logs: Under FERPA, all data collection records are educational records to which you have access. Request copies of the data sheets, curriculum-based measurement probes, and behavioral observation logs used to develop the current PLAAFP. The district must provide these within 45 days.

Request Prior Written Notice: If the team declines to revise a PLAAFP that lacks objective baseline data, or refuses to conduct updated data collection before writing the goals, request that this refusal be documented in a Prior Written Notice (Notice of Action in Missouri). The PWN must identify what evaluation data the team relied on to conclude the current PLAAFP data is sufficient.

The Connection Between Baselines and Goal Quality

Annual IEP goals in Missouri must be measurable. DESE's compliance standards require goals that specify:

• What the student will do (observable behavior)
• Under what conditions
• To what level of performance (the criterion)
• Within what timeframe (the annual period)

A goal's criterion — the "to what level" — must be anchored to the baseline. A student currently reading 45 words per minute needs a goal that specifies a target rate: "80 words per minute with 95% accuracy" is a measurable criterion. "Improved reading fluency" is not.

When baseline data is missing or vague, goals become vague. And vague goals are the school's legal protection: if there is no clear criterion, there is no clear way to show the goal was not met.

Data Collection During the Year: Who Does It and How Often

After the IEP is written, the data collection question becomes: how is progress being measured, who is collecting the data, and how often?

Ask the special education coordinator or case manager to explain the data collection system for each goal. Specifically:

• How often is data collected? Daily data is ideal for behavioral goals. Weekly CBM probes are standard for academic fluency goals. Monthly assessments may be appropriate for some skill domains but insufficient for others.
• Who collects the data? The special education teacher? A paraprofessional? A therapist? Different roles have different levels of training, which affects data reliability.
• Where is the data stored? And can you access it on request?

For students in the Special School District of St. Louis County, data collection responsibilities may fall on SSD-employed staff working inside a component district school. When there are mid-year staffing changes — a teacher reassigned, a long-term substitute brought in — data collection often falls apart. If your quarterly progress report reflects vague narratives rather than data points, a staffing transition is frequently the cause.

Baselines After an Evaluation: When to Push for Updated Data

The most common data gap occurs at the annual IEP review when the team writes the PLAAFP using the triennial evaluation data — which may be two to three years old — rather than current classroom data. Triennial evaluations establish eligibility and identify broad areas of need. They are not designed to function as current baselines for this year's specific goals.

If the most recent evaluation is more than a year old, push for current data collection before the IEP meeting. Request, in writing, that the team conduct updated curriculum-based assessments and behavioral observations in the weeks before the annual review, so the PLAAFP reflects your child's current functioning rather than their functioning from a previous school year.

If the district won't conduct updated data collection, ask what data from the current year they are using. If the answer is "progress reports from the current IEP," make sure those progress reports actually contain data points — not just narrative summaries. If they don't, you've identified both a current-year compliance gap (inadequate progress monitoring data) and a baseline gap (no current data to anchor next year's goals).

The Missouri IEP & 504 Blueprint includes tools to help Missouri parents identify data gaps in PLAAFP statements, document inadequate baselines in writing, and build the evidentiary record for DESE complaints when districts fail to provide data-based IEPs.

Summary

• Missouri IEP PLAAFP statements must include current, objective baseline data — not narrative observations
• Baselines anchor annual goals: without specific starting numbers, goals cannot be meaningfully measured
• Request the specific data sources (assessment tool, date, scores) for every PLAAFP statement before signing any IEP
• Data collection logs are educational records accessible under FERPA — request them when progress reports are inadequate
• Mid-year staffing transitions in the SSD often disrupt data collection — ask directly how monitoring continued during any gaps
• Any refusal to update baselines with current data should be documented in a Prior Written Notice

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