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Amid a freeze in key results, public school achievement in Louisiana again ranks 49th in the nation, according to a report issued Wednesday by Education Week magazine.

The study, called Quality Counts 2018, annually rates states in three areas: school achievement, chances for success and financing.

The overall rating for Louisiana is 46th among the states and a D plus.

The rating for academic achievement is the same as last year.

Sydni Dunn, a spokeswoman for the state Department of Education, said the latest report uses the same data as that cited last year for academic achievement.

Dunn said the release of key statistics used for that category, results from the National Assessment of Educational Progress, have been delayed until spring.

“Louisiana has made steady but considerable progress over time," Dunn said in a statement.

"We are committed to continually raising the bar for our students, and we look forward to seeing the report next year that will reflect how our students have improved.”

Louisiana's rating in the chances for success category is C minus. School finance also got a C minus.

Both are the same as last year and both are based on up-to-date results.

The national average is a C.

"The nation's grade of C reflects continued struggles with achievement and funding gaps even as postsecondary participation and graduation rates are higher they were last year," Holly Yettick, director of the Education Week Research Center said in a statement that accompanied the report.

The U. S. average score is 74.5. 

The Louisiana score is 68.3.

Public school achievement, which was last updated in 2016, studies both current and previous classroom performance and gaps that stem from poverty.

About two-thirds of public school students in Louisiana qualify for free and reduced lunches, a key indicator of poverty.

The chance for success category is a bid to measure the role of education in promoting positive outcomes for residents of Louisiana and elsewhere.

Louisiana finished 49th.

The school finance section examines the equity of funding in districts statewide.

The state finished 28th in that category.

Texas got a C minus overall. Mississippi got a D plus.

Overall Louisiana finished ahead of Idaho, Mississippi, New Mexico and Nevada.

The national leader is Massachusetts, which is common on key public school ratings.

Follow Will Sentell on Twitter, @WillSentell.