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“Formative assessment is not a test. Rather, it is an ongoing process in which teachers use test-elicited evidence to adjust their instruction or students use it to adjust their learning tactics .” Jim Popham
Research on formative assessment has shown that when teachers practice good formative assessment and students participate in it, BOTH achievement and motivation increase.
This achievement increase can be as much as .4 to .7 standard deviations. That’s like moving from the 50 th percentile to the 65 th or 75 th percentile.
These effect sizes are larger than most of those found for educational interventions.