Test scores released by the Oregon Department of Education on Wednesday revealed mixed results in math, reading, science and writing.
The percentage of elementary and middle students statewide who met or exceeded math standards increased in 2011-12, but declined among high school students.
In reading, the percentage of all students who met or exceeded standards declined, mainly due to tougher reading standards that the State Board of Education adopted in 2001.
However, reading skills improved among third- and fourth- graders. The percentage of high school students meeting or exceeding reading skills also slightly increased.