Most data collection systems fail for the same reason: the sheet doesn't match the behavior. A tally sheet for a behavior that lasts twenty minutes tells you nothing useful; a duration log for something that happens forty times a day is impossible to keep.
Five sheet types and when each fits
- Frequency / event count — for discrete, countable behaviors with a clear start and end: hand raises, requests, call-outs. A tally in the margin is enough.
- Duration — for behaviors where how long matters more than how often: time on task, length of a meltdown, time to complete a routine. Requires a timer you actually start.
- Momentary time sampling — glance at fixed intervals and record whether the behavior is occurring right then. The only realistic way to measure on-task behavior while you're teaching.
- Trial-by-trial — for directly taught skills: 10 trials, mark each correct or incorrect, compute a percentage. Ideal for discrete academic and communication goals.
- Latency — how long between the direction and the student starting. Underused, and often the exact right measure for initiation and transition goals.
The best sheet is the one that lives where the behavior happens. A perfect system in a binder across the room collects nothing.
Matching the sheet to common goal types
- Reading fluency → timed probe (WCPM), weekly
- Math computation → trial-by-trial percentage from a probe sheet, weekly or bi-weekly
- On-task behavior → momentary time sampling across a defined work period
- Requesting / communication → frequency count of opportunities taken vs. offered
- Transitions → latency (seconds from cue to movement) plus prompt count
- Written expression → work samples scored with the same rubric each time
- Executive functioning → permanent products: planner checks, on-time submissions in the gradebook
How to make data collection survive the school year
Three rules from teachers whose systems last: collect on fewer goals more consistently rather than all goals sporadically; attach collection to an existing fixed routine rather than to memory; and pre-print or pre-build the sheet before the first week, because a system you have to create in October never gets created.
Whatever you use on paper, the numbers still have to end up somewhere they can be charted. Photographing a tally sheet is not a progress report — the point of collection is a trend line you can show at the annual review.
