AUSTIN, Texas - Texas' on-time high school graduation rate has reached an all-time high, increasing 1.6 percent to 85.9 percent for the Class of 2011.

The Texas Education Agency said Friday that over 92 percent of Class of 2011's 319,588 students graduated in four years or continued high school for a fifth year.

The previous four-year graduation rate record was the Class of 2010's 84.3 percent.

The agency said 2011 was the first graduating class required to take four years of math and science. Deputy director Todd Webster said students not only met that challenge but "raised the bar."

Graduation rates for whites increased 0.4 percent to 92 percent, while 2011 Hispanic graduation rates increased 3 percent to 81.8 percent.

Black student graduation rates rose to 80.9 percent from 78.8 percent in 2010.