The discrepancy doesn't show up on campus or district level accountability reports, however, because most charter schools with low graduation rates are rated under alternative standards or have
high numbers of students excluded from the graduation count.
But as the National Assessment Governing Board, the U.S. Department
of Education division that oversees NAEP notes, states that
exclude more special ed and ELL
students tend to have
higher scores (and performance on NAEP) than those that
exclude lower
numbers of kids.
The state longitudinal dropout rate is calculated by determining the total
number of students enrolled in Texas public schools in seventh grade and subtracting the total
number of those same
students receiving a
high school diploma five years later,
excluding students who will not graduate but are still enrolled in the regular school program that leads to acquiring a
high school diploma (such as
students who were retained or do not have sufficient credits), divided by the
number of pupils in the original seventh grade group and multiplying by 100 to determine the percentage.