Computer glitches derail school tests in three states

School districts across several states are rescheduling high-stakes tests that judge student proficiency and determine teachers' pay because of technical problems involving the test administrators' computer systems.

Thousands of students in Indiana, Oklahoma and Minnesota have been kicked offline multiple times during testing in recent weeks. That's raised concerns about whether frustration over the tests could impact their scores.

School officials say there's no room for error on the tests that states are spending millions of dollars on and for which teachers and students are held accountable.

The stakes are even higher in Indiana. Recent changes in how teachers are evaluated tied their merit pay to student performance on the tests.

CTB/McGraw-Hill administers the tests in Indiana and Oklahoma and says it is focused on fixing the problems.