"Proficiency rates" refers to the level of skill or ability that someone has in a particular area or subject. It measures how well a person can perform or understand something. Full definition
By race / ethnicity, all groups saw increases in proficiency rates in math and science. (utahpubliceducation.org)
It earned a C from the state based on student test scores in 2015, with an overall proficiency rate of 65 percent, and failed to meet state targets for student growth. (charlotteobserver.com)
Right now the reading proficiency rate for 12th graders with parents who dropped out of high school is 17 percent. (educationnext.org)