All Oregon public schools give students year-end standardized tests to measure reading and math skills. Federal law requires it.

But Oregon students also have the right to refuse to take the exams, provided their parents give permission.

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Statewide, 94 percent of students took the tests this year. But at some schools, far, far more than 6 percent had their parents’ blessing to forgo them.

Here are the 10 schools where the largest share of students skipped out. (The list only includes schools where at least 50 sat out and excluded alternative schools.) All rates shown are for the math section of the test, which students boycott at slightly higher rates than the English section.

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10. Canby High

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Courtesy of Chelsea McLean, 2012

67% of junior took the test; 127 students sat out

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9. Benson High, Portland

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Faith Cathcart / The Oregonian / 2010

61% of juniors took the test; 84 sat out

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8. Grant High, Portland

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Ross William Hamilton / The Oregonian / 2013

52% of juniors took the test; 166 sat out

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7. Lake Oswego High

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Courtesy of Lake Oswego schools

46% of juniors took the test; 174 sat out

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6. Wilson High, Portland

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Kristyna Wentz-Graff / The Oregonian / 2015

42% of juniors took the test; 180 sat out

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5. Mount Vernon Elementary, Springfield

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Courtesy of Springfield schools

40% of third, fourth- and fifth-graders took the test; 164 sat out

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4. Mountain View High, Bend

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Courtesy of Bend-La Pine schools

25 percent of juniors took the test; 238 sat out

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3. Bend High

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Courtesy of Bend-La Pine schools

19% of juniors took the test; 303 sat out

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2. Cleveland High, Portland

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Benjamin Brink / The Oregonian / 2011

16% of juniors took the test; 301 sat out

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1. Redmond Proficiency Academy

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Courtesy of the Oregon Legislature

7% of juniors took the test; 405 sat out

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Want to know more about the tests?

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Oregon students lost ground in reading, writing and math over the past year, according to test results released Thursday...READ MORE HERE