Update on April 25: TNReady testing was supposed to resume this week in all Knox County elementary and middle schools.

However, some schools do not have all the materials needed, and testing is delayed again.

A massive technology failure prevented students across the state form finishing the test when it was originally distributed in February.

Instead of taking the test online as planned, students will use pencil and paper.

The testing period was supposed to begin April 25. It it unclear when schools will begin this next round of testing.

Original Story on April 22: The Tennessee Department of Education announced to districts Friday it won't reschedule the TNReady testing window again this year and for those districts that don't receive tests on time, will provide flexibility.

"We will not ask districts to reschedule again beyond what has been communicated to date, and we will not extend the testing window beyond May 10," according to a statement sent to districts Friday.

The education department says in the statement its priority is to students ending the year on a strong note, and doesn't want to interfere any further with student experience.

The department also added it will work with the U.S. Department of Education, the governor's office and the Tennessee State Board of Education in addressing potential cases where districts don't receive all their test materials on time.

Grades 3-8 Part II paper tests were supposed to be delivered to districts by Friday by the Tennessee Department of Education's test vendor Measurement, Inc. Districts, however, haven't received the tests and might not get all their materials until April 27, according to the education department.

The state announced to districts it would extended the testing window until May 10 on Wednesday.

"Again, we share the frustration felt by district and classroom education and sincerely apologize for the impact that Measurement, Inc.'s failure to deliver as promised has had on students, parents, teachers, and districts all across Tennessee," the statement says.

The announcement comes on the same day Tennessee House Democrats again called for a three-year moratorium on holding districts accountable on TNReady measures after another round of delays in delivering paper and pencil tests by the state's vendor.

"TNReady is still not ready," said Rep. Antonio Parkinson, D-Memphis, at a Friday morning press conference of the Tennessee House Democratic Caucus.

This is the second time Measurement, Inc. has failed to deliver tests on time after the state scrapped in February the online format of TNReady.

And the press conference marked the second time House Democrats have called for a moratorium, saying on Friday that they predicted further issues in administering the test

For now, the districts statewide have a one-year reprieve in testing measures.

Legislators have moved to hold teachers "harmless" on evaluation measures this year, and last week, the Achievement School District announced it will not take over any low-performing schools for the 2017-18 school year, seemingly due to the TNReady testing debacle this year.

House Democrats also called for the education department to move away from Measurement, Inc. and also called for the Tennessee Comptroller of the Treasury to look into how much the state has paid toward its contract with the testing vendor. Parkinson asked if there would be a refund to the state.

Education Commissioner Candice McQueen has said the state has paid $1.8 million toward its $108 million five-year contract with the company.

Rep. G.A. Hardaway, D-Memphis, asked for the education department to develop a short- and long-term plan for rolling out the test.

"As the saying goes, 'it's not ready for primetime,' " he said. "It's not even for public consumption."