Discover the science of measuring learning. Precision Teaching provides tools to see learning in ways traditional methods cannot, enabling data-driven decisions that accelerate progress.
Precision Teaching is a measurement system for learning developed by Ogden Lindsley in the 1960s. Rather than prescribing what or how to teach, Precision Teaching provides a framework for measuring learning precisely enough to make informed instructional decisions.
The key insight of Precision Teaching is that frequency (count per minute) reveals learning that accuracy alone cannot show. A student can be 100% accurate on a skill yet still struggle to use that skill fluently in real-world situations. By measuring both accuracy and speed, Precision Teaching identifies when learners have achieved true fluency—the level of performance that predicts retention and application.
"The learner knows best."— Ogden Lindsley, founder of Precision Teaching
Four foundational concepts that define the Precision Teaching approach to measuring and accelerating learning.
Precision Teaching uses count per minute rather than percentage correct as the primary measure of learning.
Consistent daily practice with systematic data collection drives improvement.
Performance targets that predict retention, endurance, stability, and application (RESA outcomes).
A semi-logarithmic chart using a "times-divide" scale that reveals learning patterns invisible on linear charts.
Research suggests that fluent performance produces four critical outcomes that distinguish true mastery from mere accuracy.
Fluent skills are remembered longer without practice
Fluent skills can be performed for extended periods
Fluent skills remain accurate despite distractions
Fluent skills transfer to new situations and contexts
These outcomes are associated with fluent performance in Precision Teaching literature. Individual results may vary.
Precision Teaching has evolved over six decades, from its origins at Harvard to modern digital applications.
Ogden Lindsley, a student of B.F. Skinner, developed Precision Teaching while working with individuals with developmental disabilities.
Teachers were spending 20-30 minutes describing their unique charting systems. Lindsley created the Standard Celeration Chart so progress could be shared instantly.
Graf and Lindsley developed SAFMEDS (Say All Fast Minute Every Day Shuffled) as a structured fluency-building procedure.
Kent Johnson's Morningside Academy demonstrated remarkable results using Precision Teaching methods with at-risk learners.
Owen White, Malcolm Neely, and others published comprehensive guides to SCC conventions, including "The Chart Book" (2004).
Precision Teaching methods adapted for digital platforms, making fluency-based learning and automatic charting more accessible.
SAFMEDS (Say All Fast Minute Every Day Shuffled) is a fluency-building procedure developed within the Precision Teaching framework. Each element of the acronym represents a critical component:
TAFMEDS (Type All Fast Minute Every Day Shuffled) adapts the SAFMEDS method for digital practice. Instead of saying responses aloud, you type them—enabling automatic timing, scoring, and progress tracking.
Try TAFMEDS FreeBegin applying Precision Teaching principles to your learning today.
Select material you want to build fluency with—terminology, facts, procedures, or any content that benefits from rapid recall.
Determine your target count per minute based on response type and content. Use our Fluency Aim Calculator for guidance.
Complete daily timed practice sessions and record your data. Track progress over time to see your celeration (learning rate).
TAFMEDS brings Precision Teaching principles to digital flashcard practice. Build fluency with automatic timing, scoring, and Standard Celeration Charts.