Days of Learning: CREDO's translation of growth in standard deviation units into days of a 180-day school year¶

Element · All elements
Evidence · no claims cited

Description¶

Days of Learning is CREDO's translation device for making statistical growth results accessible to non-technical audiences. The report explains that CREDO "uses those annual measures of average learning to represent a typical year of learning, and equates that to a typical 180-day school year," so extra or missing progress is expressed as days added to or subtracted from a 180-day base. In this report, growth in standard deviation units is converted into days of learning so results "can be assessed for statistical differences" while remaining interpretable.

Design Implications¶

Context¶

Requirements¶

• Annual achievement test scores across consecutive grades from which average year-to-year learning can be computed
• State testing data across consecutive grades from which average year-to-year learning can be computed for each grade transition

Constraints¶

• The measure is a translation of statistical growth estimates, not a direct count of instructional days attended
• Growth is expressed relative to the state average year of learning on a typical 180-day school year, not as an absolute measure of achievement

Target Learners¶

• K-12 students in tested grades

Target Learning Goals¶

• Annual academic growth in reading and mathematics

Related Elements¶

• Days of Learning translation of growth results

Examples¶

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Key Sources¶

• City Study 2022: Fort Worth. (2022). CREDO. https://credo.stanford.edu/reports/item/fort-worth-tx-2022/
• City Study 2022: NEWARK. (2022). CREDO, Stanford University. https://credo.stanford.edu