The latest NAPLAN test results show Tasmanian students are still struggling compared to the rest of the nation.

The results have been released for this year's testing of 25,000 students in grades three, five, seven and nine.

The percentage of students who achieved minimum national standards increased in 10 of the 20 assessment areas, compared to 14 last year.

Reading was Tasmania's strong point, with big improvements in year five.

But students in years seven and nine remain below the national average in all disciplines.

Education Minister Nick McKim has acknowledged that is a concern, but says progress is being made.

"Everyone in the sector is doing all that they can to improve educational outcomes," he said.