Parent and education researcher,
Even though SAT scores are reported for high schools, the test isn't an official school exam and is unrelated to "yearly progress."
"Yearly progress," or "Annual Yearly Progress" (AYP) as it's officially known, is a set of measures that schools were required to meet under the federal "No Child Left Behind" (NCLB) law. Schools had to demonstrate that ALL of their students were making progress from year to year on state exams. In order to make sure that schools were effectively educating everyone and not just their strongest students, there were different sub-categories that the state and federal Departments of Education looked at. For example, they broke out math and English learning outcomes for students with Individualized Educational Plans (IEPs) or English Language Learners (ELLs). If a school wasn't showing learning progress overall or for a subset of its students, it was described as "not meeting AYP." If this happened for a couple of years in a row, schools could be subject to sanctions. (All of this is further complicated by the fact that NCLB expired in 2007 but still affects many educational policies.)
According to a report by the US Department of Education, Coronado HS was investigated for practices in 2009, 2010, and 2011 that led to unreliable AYP data being submitted to the Texas Education Agency and the US Department of Education. In brief, the investigators found that two high schools were preventing certain students from taking the state exams that measured AYP and were graduating students who had not taken a required exam. By keeping certain kids out of the test and graduating them without these results, it wasn't possible to know if the schools were effectively educating all of their students.
Three final points: 1) the investigation found that the other high school involved had more extensive violations than Coronado HS; 2) the former El Paso Superintendent pled guilty to conspiracy to commit fraud charges and admitted to wrongdoing related to these issues. He was fined and sent to prison; 3) Coronado HS's principal, Mauricio Morales disagrees with the report conclusions.
(If you want to learn more, this link provides the official report from June, 2013: https://www2.ed.gov/about/offices/list/oig/auditreports/fy2013/a06l0001.pdf)