The most improved public high schools in Connecticut are Common Ground High School, Portland High School and Windsor Locks High School.
A school's improvement is based on a its total rise in ranking spots during the last five years (2019-24).
Improved Rank Range: 136
297
Avg. Improved Rank: 191
Most Improved Public High Schools in Connecticut (2024)
School
(Math and Reading Proficiency)
(Math and Reading Proficiency)
Ranking Change (2019-24)
Grades
Location
Rank: #11.
Common Ground High School
Charter School
(Math: ≤20% | Reading: 40-59%)
Rank:
Rank:
4/
Bottom 50%10
Rank Change: +297
(from 906 to 609)
(from 906 to 609)
Grades: 9-12
358 Springside Ave.
New Haven, CT 06515
(203) 389-4333
New Haven, CT 06515
(203) 389-4333
Rank: #22.
Portland High School
(Math: 45-49% | Reading: 75-79%)
Rank:
Rank:
8/
Top 30%10
Rank Change: +281
(from 481 to 200)
(from 481 to 200)
Grades: 9-12
95 High Street
Portland, CT 06480
(860) 342-1720
Portland, CT 06480
(860) 342-1720
Rank: #33.
Windsor Locks High School
(Math: 25-29% | Reading: 60-64%)
Rank:
Rank:
6/
Top 50%10
Rank Change: +274
(from 730 to 456)
(from 730 to 456)
Grades: 9-12
58 South Elm St.
Windsor Locks, CT 06096
(860) 292-5032
Windsor Locks, CT 06096
(860) 292-5032
Rank: #44.
Rocky Hill High School
(Math: 55-59% | Reading: 75-79%)
Rank:
Rank:
9/
Top 20%10
Rank Change: +258
(from 392 to 134)
(from 392 to 134)
Grades: 9-12
50 Chapin Ave.
Rocky Hill, CT 06067
(860) 258-7721
Rocky Hill, CT 06067
(860) 258-7721
Rank: #55.
Cooperative High School - Inter-district Magnet
Magnet School
(Math: 10-14% | Reading: 55-59%)
Rank:
Rank:
4/
Bottom 50%10
Rank Change: +251
(from 837 to 586)
(from 837 to 586)
Grades: 9-12
177 College Street
New Haven, CT 06511
(475) 220-2400
New Haven, CT 06511
(475) 220-2400
Rank: #66.
Aerospace/hydrospace Engineering And Physical Sciences Magne
Magnet School
(Math: 30-34% | Reading: 50-54%)
Rank:
Rank:
5/
Bottom 50%10
Rank Change: +242
(from 730 to 488)
(from 730 to 488)
Grades: 9-12
840 Old Town Road
Bridgeport, CT 06606
(203) 275-3343
Bridgeport, CT 06606
(203) 275-3343
Rank: #77.
Putnam High School
(Math: 30-39% | Reading: 50-59%)
Rank:
Rank:
5/
Bottom 50%10
Rank Change: +240
(from 714 to 474)
(from 714 to 474)
Grades: 9-12
152 Woodstock Ave.
Putnam, CT 06260
(860) 963-6905
Putnam, CT 06260
(860) 963-6905
Rank: #88.
Terryville High School
(Math: 40-49% | Reading: 60-69%)
Rank:
Rank:
7/
Top 50%10
Rank Change: +237
(from 582 to 345)
(from 582 to 345)
Grades: 9-12
33 North Harwinton Avenue
Terryville, CT 06786
(860) 314-2777
Terryville, CT 06786
(860) 314-2777
Rank: #99.
Norwalk High School
(Math: 33% | Reading: 58%)
Rank:
Rank:
6/
Top 50%10
Rank Change: +227
(from 677 to 450)
(from 677 to 450)
Grades: 9-12
23 Calvin Murphy Street
Norwalk, CT 06851
(203) 838-4481
Norwalk, CT 06851
(203) 838-4481
Rank: #1010.
Quinebaug Middle College
Magnet School
(Math: 11-19% | Reading: 50-59%)
Rank:
Rank:
4/
Bottom 50%10
Rank Change: +224
(from 826 to 602)
(from 826 to 602)
Grades: 9-12
742 Upper Maple St.
Danielson, CT 06239
(860) 932-4100
Danielson, CT 06239
(860) 932-4100
Rank: #1111.
Brien Mcmahon High School
(Math: 30% | Reading: 58%)
Rank:
Rank:
6/
Top 50%10
Rank Change: +216
(from 685 to 469)
(from 685 to 469)
Grades: 9-12
300 Highland Avenue
Norwalk, CT 06854
(203) 852-9488
Norwalk, CT 06854
(203) 852-9488
Rank: #12 - 1312. - 13.
Plainville High School
(Math: 40-44% | Reading: 60-64%)
Rank:
Rank:
6/
Top 50%10
Rank Change: +203
(from 582 to 379)
(from 582 to 379)
Grades: 9-12
47 Robert Holcomb Way
Plainville, CT 06062
(860) 793-3220
Plainville, CT 06062
(860) 793-3220
Rank: #12 - 1312. - 13.
Oliver Wolcott Technical High School
Vocational School
(Math: 10-14% | Reading: 50-54%)
Rank:
Rank:
4/
Bottom 50%10
Rank Change: +203
(from 837 to 634)
(from 837 to 634)
Grades: 9-12
75 Oliver St.
Torrington, CT 06790
(860) 496-5300
Torrington, CT 06790
(860) 496-5300
Rank: #1414.
New Fairfield High School
(Math: 55-59% | Reading: 75-79%)
Rank:
Rank:
9/
Top 20%10
Rank Change: +202
(from 336 to 134)
(from 336 to 134)
Grades: 9-12
54 Gillotti Rd.
New Fairfield, CT 06812
(203) 312-5800
New Fairfield, CT 06812
(203) 312-5800
Rank: #1515.
John F. Kennedy High School
(Math: 15-19% | Reading: 35-39%)
Rank:
Rank:
3/
Bottom 50%10
Rank Change: +191
(from 902 to 711)
(from 902 to 711)
Grades: 9-12
422 Highland Ave.
Waterbury, CT 06708
(203) 574-8153
Waterbury, CT 06708
(203) 574-8153
Rank: #1616.
Cromwell High School
(Math: 50-54% | Reading: 65-69%)
Rank:
Rank:
8/
Top 30%10
Rank Change: +186
(from 434 to 248)
(from 434 to 248)
Grades: 9-12
1 Donald Harris Dr.
Cromwell, CT 06416
(860) 632-4841
Cromwell, CT 06416
(860) 632-4841
Rank: #1717.
Francis T. Maloney High School
(Math: 20% | Reading: 45%)
Rank:
Rank:
4/
Bottom 50%10
Rank Change: +183
(from 822 to 639)
(from 822 to 639)
Grades: 9-12
121 Gravel St.
Meriden, CT 06450
(203) 238-2334
Meriden, CT 06450
(203) 238-2334
Rank: #18 - 1918. - 19.
The Morgan School
(Math: 45-49% | Reading: 65-69%)
Rank:
Rank:
8/
Top 30%10
Rank Change: +181
(from 459 to 278)
(from 459 to 278)
Grades: 9-12
71 Killingworth Tpke.
Clinton, CT 06413
(860) 664-6504
Clinton, CT 06413
(860) 664-6504
Rank: #18 - 1918. - 19.
Wilbur Cross High School
(Math: 15-19% | Reading: 35-39%)
Rank:
Rank:
3/
Bottom 50%10
Rank Change: +181
(from 892 to 711)
(from 892 to 711)
Grades: 9-12
181 Mitchell Dr.
New Haven, CT 06511
(475) 220-7400
New Haven, CT 06511
(475) 220-7400
Rank: #2020.
Waterbury Arts Magnet School
Magnet School
(Math: 20-24% | Reading: 45-49%)
Rank:
Rank:
4/
Bottom 50%10
Rank Change: +175
(from 755 to 580)
(from 755 to 580)
Grades: 6-12
16 South Elm St.
Waterbury, CT 06706
(203) 573-6300
Waterbury, CT 06706
(203) 573-6300
Rank: #2121.
Montville High School
(Math: 40-44% | Reading: 65-69%)
Rank:
Rank:
7/
Top 50%10
Rank Change: +172
(from 493 to 321)
(from 493 to 321)
Grades: 9-12
800 Old Colchester Rd.
Oakdale, CT 06370
(860) 848-9208
Oakdale, CT 06370
(860) 848-9208
Rank: #2222.
Ella T. Grasso Technical High School
Vocational School
(Math: 15-19% | Reading: 35-39%)
Rank:
Rank:
3/
Bottom 50%10
Rank Change: +165
(from 876 to 711)
(from 876 to 711)
Grades: 9-12
189 Fort Hill Rd.
Groton, CT 06340
(860) 448-0220
Groton, CT 06340
(860) 448-0220
Rank: #2323.
Information Technology & Software Engineering Magnet High School
Magnet School
(Math: 25-29% | Reading: 45-49%)
Rank:
Rank:
5/
Bottom 50%10
Rank Change: +162
(from 703 to 541)
(from 703 to 541)
Grades: 9-12
840 Old Town Road
Bridgeport, CT 06606
(203) 275-3372
Bridgeport, CT 06606
(203) 275-3372
Rank: #2424.
Shepaug Valley School
(Math: 61% | Reading: 76%)
Rank:
Rank:
9/
Top 20%10
Rank Change: +159
(from 301 to 142)
(from 301 to 142)
Grades: 6-12
159 South Street
Washington, CT 06793
(860) 868-7326
Washington, CT 06793
(860) 868-7326
Rank: #2525.
Windsor High School
(Math: 26% | Reading: 55%)
Rank:
Rank:
5/
Bottom 50%10
Rank Change: +152
(from 676 to 524)
(from 676 to 524)
Grades: 9-12
50 Sage Park Rd.
Windsor, CT 06095
(860) 687-2020
Windsor, CT 06095
(860) 687-2020
Rank: #26 - 2726. - 27.
Ellington High School
(Math: 45-49% | Reading: 65-69%)
Rank:
Rank:
8/
Top 30%10
Rank Change: +150
(from 428 to 278)
(from 428 to 278)
Grades: 9-12
37 Maple St.
Ellington, CT 06029
(860) 896-2352
Ellington, CT 06029
(860) 896-2352
Rank: #26 - 2726. - 27.
Torrington High School
(Math: 20-24% | Reading: 45-49%)
Rank:
Rank:
4/
Bottom 50%10
Rank Change: +150
(from 730 to 580)
(from 730 to 580)
Grades: 9-12
50 Major Besse Dr.
Torrington, CT 06790
(860) 489-2294
Torrington, CT 06790
(860) 489-2294
Rank: #2828.
East Lyme High School
(Math: 57% | Reading: 79%)
Rank:
Rank:
9/
Top 20%10
Rank Change: +149
(from 281 to 132)
(from 281 to 132)
Grades: 9-12
30 Chesterfield Rd.
East Lyme, CT 06333
(860) 739-6946
East Lyme, CT 06333
(860) 739-6946
Rank: #29 - 3029. - 30.
Ledyard High School
(Math: 40-44% | Reading: 65-69%)
Rank:
Rank:
7/
Top 50%10
Rank Change: +147
(from 468 to 321)
(from 468 to 321)
Grades: 9-12
24 Gallup Hill Rd.
Ledyard, CT 06339
(860) 464-9600
Ledyard, CT 06339
(860) 464-9600
Rank: #29 - 3029. - 30.
Seymour High School
(Math: 35-39% | Reading: 60-64%)
Rank:
Rank:
6/
Top 50%10
Rank Change: +147
(from 545 to 398)
(from 545 to 398)
Grades: 9-12
2 Botsford Rd.
Seymour, CT 06483
(203) 888-2561
Seymour, CT 06483
(203) 888-2561
Rank: #3131.
Bloomfield High School
(Math: 15-19% | Reading: 45-49%)
Rank:
Rank:
4/
Bottom 50%10
Rank Change: +144
(from 774 to 630)
(from 774 to 630)
Grades: 9-12
5 Huckleberry Ln.
Bloomfield, CT 06002
(860) 286-2630
Bloomfield, CT 06002
(860) 286-2630
Rank: #3232.
Parish Hill High School
(Math: 45-49% | Reading: 60-64%)
Rank:
Rank:
7/
Top 50%10
Rank Change: +139
(from 468 to 329)
(from 468 to 329)
Grades: 7-12
304 Parish Hill Rd.
Chaplin, CT 06235
(860) 455-9584
Chaplin, CT 06235
(860) 455-9584
Rank: #3333.
North Haven High School
(Math: 41% | Reading: 64%)
Rank:
Rank:
6/
Top 50%10
Rank Change: +138
(from 527 to 389)
(from 527 to 389)
Grades: 9-12
221 Elm Street
North Haven, CT 06473
(203) 239-1641
North Haven, CT 06473
(203) 239-1641
Rank: #34 - 3534. - 35.
Oxford High School
(Math: 45-49% | Reading: 65-69%)
Rank:
Rank:
8/
Top 30%10
Rank Change: +136
(from 414 to 278)
(from 414 to 278)
Grades: 9-12
61 Quaker Farms Rd.
Oxford, CT 06478
(203) 888-2468
Oxford, CT 06478
(203) 888-2468
Rank: #34 - 3534. - 35.
East Haven High School
(Math: 15-19% | Reading: 40-44%)
Rank:
Rank:
3/
Bottom 50%10
Rank Change: +136
(from 809 to 673)
(from 809 to 673)
Grades: 9-12
35 Wheelbarrow Ln.
New Haven, CT 06513
(203) 468-3254
New Haven, CT 06513
(203) 468-3254
Show 100 more public schools in CT (out of 204 total schools)
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