Nearly 94 percent of districts and around 88 percent of public schools in Texas have met minimum education standards in the final year before shifting to an A-F letter grade accountability system.

The Texas Education Agency announced the results Monday. It has frequently overhauled ratings systems lately to ensure low failure rates, meaning this year's results are only fully comparable to the last three years'.

In 2015, nearly 95 percent of school districts met minimum state standards and about 87 percent of schools did. The previous year, it was 90 percent of districts and 85 percent of schools.

Critics complain that Texas has watered down its accountability rating to near meaninglessness. Starting next academic year, though, the state will begin rating schools and districts with a system that includes controversial 'Fs.'