For special education teachers and interventionists

Measure it. Graph it. Then decide.

Goal Data Notebook explains how to set baselines, collect and graph IEP goal data, and use decision rules, with the federal requirement behind each step and three small calculators that run in your browser.

Recently updated

Each guide is re-read against its sources on a schedule. The date on a guide is the last time we did.

Tools and organization

A Sample IEP Data Binder Layout That Stays Current

A tab-by-tab IEP data binder or folder layout with a one-page goal card, a data log, a graph, and report copies, plus an upkeep routine and privacy notes.

9 min read, updated October 23, 2026
Tools and organization

A Weekly Data Routine for a Special Education Caseload

A model week for collecting, graphing, and reviewing IEP data for a caseload, with a time budget, a review cycle, and what to do when a week falls apart.

9 min read, updated October 23, 2026
Data collection

ABC Data Sheets Explained for Teachers

How to record antecedent, behavior, and consequence: what to note, when an ABC form beats a tally, how long to observe, and what it cannot prove.

9 min read, updated October 23, 2026
Graphing

Aimline and Trendline Explained for IEP Progress Graphs

What an aimline (goal line) and a trendline are, how to draw both, and how NCII's decision rules compare them, with a calculator for the slopes.

10 min read, updated October 23, 2026
Baselines

Baseline vs Present Levels: What Goes Where in an IEP

A baseline is one measured number. Present levels (PLAAFP) wrap it in strengths, impact, and comparison. See what goes where, with Utah and NCII examples.

8 min read, updated October 23, 2026
Data collection

Behavior Frequency and Duration Data for IEP Goals

How to count, time, and compare behavior data for an IEP goal: frequency, duration, latency, and intensity, with a baseline plan and worked examples.

10 min read, updated October 23, 2026

How we work

Methods you can check

The federal rule says the IEP must describe how progress will be measured and reported. It does not say how many data points, which graph, or when to change a plan. We separate what a rule requires from what research and practice suggest, name the source of each, and say plainly when the answer is your team's call.

How we review Our sources

  • Worked examples use invented students and invented numbers, labeled as such.
  • The calculators run in your browser. Nothing you type is sent or saved.
  • No student names, ever. Do not send us records.
  • Nothing here is legal, psychological, or educational advice.

Terms you will see

A few of the words that come up most. The full glossary has the rest.

Aimline
A straight line from the baseline to the goal, showing the growth needed to reach the goal on time.
Baseline
The student's performance on a skill before instruction on a goal begins.
Progress monitoring
Regularly measuring a student's performance on a goal to see whether instruction is working.
Trendline
A line fitted through the data points that summarizes their direction.