Standardized test results released Friday showed a slight improvement statewide, with students averaging a 3 percent growth in proficiency on English tests and about 1 percent growth in proficiency on math.

The chart below shows growth from 2011 to 2012 in English and math by district, along with the change.

PERCENTAGE OF CONTRA COSTA DISTRICT STUDENTS SCORING "PROFICIENT" OR BETTER 2011 English 2012 English Change 2011 Math 2012 Math Change

Acalanes 84.8 87.2 +2.4 56.1 57.5 +1.4

Antioch 47.1 49.2 +2.1 38.3 40.4 +2.1

Brentwood 65.8 69.1 +3.3 68.3 68.4 +0.1

Byron 62.1 64.4 +2.3 64.4 65.5 +1.1

Canyon 79.6 78.8 -0.8 70.4 71.7 +1.3

John Swett 46.4 50.3 +3.9 42.1 43.0 +0.9

Knightsen 64.4 61.7 -2.7 68.4 67.9 -0.5

Lafayette 85.3 87.6 +2.3 85.4 88.0 +2.6

Liberty 52.9 60.4 +7.5 26.0 29.5 +3.5

Martinez 66.8 69.0 +2.2 62.3 65.6 +3.2

Moraga 91.8 93.3 +1.5 90.6 90.6 same

Mt. Diablo 56.8 59.4 +2.6 52.1 53.1 +2.0

Oakley 55.9 61.0 +5.1 52.9 57.3 +4.4

Orinda 91.6 93.1 +1.5 91.2 92.1 +0.9

Pittsburg 41.0 44.3 +3.3 41.9 43.5 +1.6

San Ramon 84.7 86.1 +1.4 78.5 79.4 +0.9

Walnut Creek 81.0 83.4 +2.4 79.9 82.7 +2.8

West Contra Costa 42.0 44.2 +2.2 37.8 38.1 +0.3

CONTRA COSTA COUNTY 60.6 63.3 +2.7 55.1 56.5 +1.4

CALIFORNIA 54.4 57.2 +2.8 50.4 51.5 +1.1

Source: California Department of Education

Detailed results, including school scores, are available at http://www.cde.ca.gov.

For more information about scores in county schools, read the On Assignment blog at http://www.ibabuzz.com/onassignment.

Theresa Harrington covers education in Contra Costa County. Contact her at 925-945-4764 or tharringon@bayareanewsgroup.com. Follow her at Twitter.com/tunedtotheresa.