The sampling process for NAEP 2008 began with the selection of
primary sampling units across the nation. Then schools from two
sampling units in Idaho were picked for the 2008 assessments.
Finally, students were selected from the sampled schools on a
random basis for testing. In the first stage of sampling, twelve
Idaho (12) schools were selected from southwest Idaho --the
"blue area" on the map to the right -- to take part in the NAEP
2008 National Arts Assessment or in Item Field Testing for NAEP
2009. Only one Idaho school was selected for the national arts
assessment. Then sixteen (16) Idaho schools were selected from
southern Idaho -- the "yellow area" on the map -- to take part
in the NAEP 2008 Long-Term Trend Assessment. In the final stage
of sampling, individual students were selected on a random basis
to take part in the assessment. The number of students selected
in a given school varied depending of (a) the size of the
school, (b) the grade level or age of the students, and (c) the
NAEP assessment