Nearly eight-thousand teachers in Houston are going home richer this week.
School administrators are handing out bonuses of up to seven-thousand, 175 dollars -- in the nation's largest merit pay program.
The Houston Independent School District board passed the program last year.
Some educators will receive rewards for improving student performance on standardized tests.
Those who teach math, reading or science have the greatest bonus potential.
But Houston Federation of Teachers president Gayle Fallon says the program is unfair to teachers outside the core subject areas.
The U.S. Department of Education gave HISD eleven-point-eight (M) million dollars to support merit pay over five years.
Houston -- with about 12,500 teachers and 210,000 students -- is the largest district in Texas and seventh-biggest in the country.