Ten Connecticut school districts can produce two high school graduates for the price of one Hartford high school diploma, according to Department of Education data.

The most recent 13 years of education, representing kindergarten through 12th grade, cost $165,275 in Hartford. With a graduation rate of 69.3 percent, the cost per diploma in Hartford is $238,492.

In 2010, Hartford’s costs were less than double the costs of the most efficient school districts.

Monroe and Tolland remained Connecticut’s most efficient school districts by combining high graduation rates and low costs.

Madison has the highest test scores among the 10 most efficient schools and within its peer group, according to the Global Report Card, despite having lower costs than all but one of its peers.

Wolcott is the third-most efficient district in the state and the most efficient in its peer group, district reference group F. It is the best performer on tests in its peer group, while spending of $30,000 per student less than Stafford, the most expensive district in the group.

Although scoring poorly relative to the rest of the state, Waterbury has the best scores in its peer group, DRG I, and the lowest costs.

East Haven is also the most efficient district among its peers, while maintaining test scores near the top of DRG G.

Ellington, Southington, North Haven, Stratford, Litchfield and Griswold became more efficient by increasing their graduation rate.

Shelton, Thompson, East Windsor, East Granby and Canton all became less efficient because of falling graduation rates.

Cheshire had the smallest spending increase in the state and moved into the top 25 most efficient districts.

In DRG A, Ridgefield stands out with low costs while maintaining competitive test scores. Ridgefield spent $10,000 less than the second most efficient school in its peer group (Wilton) and $30,000 less than the most expensive in the group (Westport).

Greenwich performed worse on tests than all its peers except one, despite spending $30,000 more than the second most expensive district in its group (Fairfield) and almost $80,000 more than the least expensive (Monroe).

Canton, Ellington and Regional School District 10 had the best test results in DRG C, but were among the more efficient schools in the group and spent $10,000 less than the state average. Regional School District 12 spent $40,000 more but had inferior test results.

East Lyme had the best test outcomes in DRG D, but spent $25,000 less than Clinton, the most expensive district in the group.

Editor’s Note: Due to an error in last year’s data, Raising Hale recently issued a correction.


2011 Data

Sorted by rank | Alphabetical

DRG: A | B | C | D | E | F | G | H | I

Highest-cost districts
1. Hartford School District $238,492
2. Bridgeport School District $193,372
3. New Haven School District $192,373
4. Greenwich School District $188,117
5. Windham School District $181,738
Average cost: $140,230
Lowest-cost districts
107. Watertown School District $116,689
108. Colchester School District $116,223
109. Wolcott School District $115,555
110. Tolland School District $114,356
111. Monroe School District $ 109,911

Explanation of Rank Changes

If the “Change in Ranking” for a school district is negative (-) then the district became less expensive relative to other districts. If the ranking increased, it became relatively more expensive and moved up the list. This applies to both the total and adjusted rankings.

Largest negative rank changes (schools became more efficient)

Ellington: -29, increased graduation rate
Southington: -19, increased graduation rate
North Haven: -18, increased graduation rate
Stratford: -17, increased graduation rate
Litchfield: -17, increased graduation rate
Cheshire: -16, smallest spending increase in the state
Griswold: -16, increased graduation rate

Largest positive rank changes (schools became more expensive)

Shelton: +41, lower graduation rate
Thompson: +26, lower graduation rate
East Windsor: +24, lower graduation rate
East Granby: +19, lower graduation rate
Canton: +14, lower graduation rate

Methodology: To calculate the cost per graduate, the Yankee Institute took data from the Connecticut Department of Education for average annual expenditures per student going back 13 years, representing K-12. After totaling the cost, it was divided by the graduation rate to come up with the lifetime cost per graduate. The 13th year is the 2008-2009 school year, and data is not adjusted for inflation, so the real cost of 2011 graduates is higher than calculated. Communities with high annual costs, more drop outs and lower graduation rates end up with the more expensive graduates. Some regional school districts, districts with less than 13 years of data, charter schools and other non-traditional schools were left out of the calculations to keep the data consistent for the greatest number of schools.

For comparison purposes, two new data points were added to the 2011 data: district reference groups and test scores. The state Department of Education uses DRGs to group similar school districts together. Test scores in reading and math are from the Global Report Card. The percentiles compare the average student in each district to all other students in Connecticut. For example, in a district with a math score of 50 percent, the average student scores better than half of the students in Connecticut.

Correction: The 2011 data and rankings have been updated to reflect a correction. Incorrect data for the total 13 year cost per student for Regional School Districts 4, 13 and 14 has been corrected. These changes only affected the schools mentioned above and did not affect the overall rankings.