NAEP Technical DocumentationSummarizing the Results

Upon completion of all assessment sessions, field staff calculate the total session attendance rate to determine whether a make-up session must be scheduled. A make-up session is required when the total session attendance rate is below 90 percent. Field staff schedule a make-up session with the School Coordinator prior to departing the school.

Field staff calculate the total session attendance rate using the following formula:

• Add the number of students originally sampled plus any sampled newly identified students to obtain the total number of students sampled. 

• Subtract the number of students who are withdrawn, ineligible, or excluded to obtain the number of eligible students.

• Add the number of students who refused to participate or whose parents refused to permit them to participate to obtain the total number of refusals.

• Subtract the refusals from the number of eligible students to determine the number of students to be assessed.

• Divide the number of students assessed by the number to be assessed. If the quotient is below 90 percent, a make-up session is required.

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