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BRONX > District 10 > K-8 (Public)

P.S. 20 P.O.George J. Werdan III

Percent of school’s ratings that were “above average” or “high”

Math

16%

  • Lower than NYC average (25%)

English

7%

  • Much lower than NYC average (25%)

Understanding the Ratings

Each teacher receives a percentile ranking, plus a margin of error that indicates the amount of uncertainty for that ranking. In the example shown at right, the score of 50 indicates that the teacher is average, but may range from the 20th percentile (below average) to the 80th percentile (above average).

Example Rating
Key-holder

4th Grade

Teacher Math 2010 Math Career English 2010 English Career
Lea Sacuto Daley
31
Class-3
31
Class-3
16
Class-4
16
Class-4
Number of students 19 19 19 19
Expected avg. test score* 0.03 0.03 0.01 0.01
Actual avg. test score* -0.1 -0.1 -0.19 -0.19
Value-added -0.13 -0.13 -0.2 -0.2
Cecilia Gadioma Iglesia
35
Class-3
65
Class-3
64
Class-3
71
Class-3
Number of students 24 65 24 66
Expected avg. test score* 0.44 0.3 0.42 0.29
Actual avg. test score* 0.34 0.38 0.51 0.4
Value-added -0.1 +0.08 +0.09 +0.11
Patricia Powell
37
Class-3
52
Class-3
52
Class-3
52
Class-3
Number of students 17 31 17 32
Expected avg. test score* 0.19 0.25 0.29 0.24
Actual avg. test score* 0.1 0.25 0.31 0.26
Value-added -0.09 0.0 +0.02 +0.02
Cristina Perez Padilla
7
Class-4
5
Class-4
67
Class-3
60
Class-3
Number of students 20 42 19 41
Expected avg. test score* -0.23 -0.25 -0.3 -0.47
Actual avg. test score* -0.57 -0.57 -0.2 -0.41
Value-added -0.34 -0.32 +0.11 +0.06

5th Grade

Teacher Math 2010 Math Career English 2010 English Career
Takami Dunn and Shannon Feeheley
85
Class-2
85
Class-2
83
Class-2
83
Class-2
Number of students 23 23 23 23
Expected avg. test score* -0.5 -0.5 -0.51 -0.51
Actual avg. test score* -0.23 -0.23 -0.32 -0.32
Value-added +0.27 +0.27 +0.19 +0.19
George Lynch Iii
72
Class-3
79
Class-2
33
Class-3
42
Class-3
Number of students 24 44 21 41
Expected avg. test score* -0.51 -0.38 -0.51 -0.45
Actual avg. test score* -0.36 -0.2 -0.61 -0.49
Value-added +0.14 +0.18 -0.1 -0.04
Latosha Thomas
45
Class-3
40
Class-3
53
Class-3
58
Class-3
Number of students 27 39 27 39
Expected avg. test score* 0.21 0.1 0.12 0.06
Actual avg. test score* 0.18 0.06 0.12 0.08
Value-added -0.03 -0.05 0.0 +0.02
Wilfred Cadiz
51
Class-3
63
Class-3
22
Class-4
16
Class-4
Number of students 28 52 28 51
Expected avg. test score* 0.54 0.24 0.36 0.12
Actual avg. test score* 0.54 0.31 0.21 -0.05
Value-added 0.0 +0.07 -0.16 -0.17

6th Grade

Teacher Math 2010 Math Career English 2010 English Career
Mirna Blanco
2
Class-5
5
Class-4
N.A.
N.A.
Number of students 61 201
Expected avg. test score* 0.25 0.2
Actual avg. test score* -0.19 -0.1
Value-added -0.44 -0.31
Lissette Torres
68
Class-3
63
Class-3
73
Class-3
52
Class-3
Number of students 24 51 22 44
Expected avg. test score* 0.03 0.04 -0.23 -0.2
Actual avg. test score* 0.13 0.11 -0.13 -0.2
Value-added +0.1 +0.07 +0.1 0.0
Erin Dotterer
47
Class-3
47
Class-3
N.A.
N.A.
Number of students 13 13
Expected avg. test score* -0.96 -0.96
Actual avg. test score* -0.99 -0.99
Value-added -0.03 -0.03
Mary Ellen Devitt
N.A.
N.A.
26
Class-3
26
Class-3
Number of students 60 60
Expected avg. test score* 0.15 0.15
Actual avg. test score* 0.03 0.03
Value-added -0.12 -0.12

7th Grade

Teacher Math 2010 Math Career English 2010 English Career
Richard Gartner
21
Class-4
21
Class-4
N.A.
N.A.
Number of students 27 27
Expected avg. test score* 0.35 0.35
Actual avg. test score* 0.18 0.18
Value-added -0.17 -0.17
Jesse Riley and Richard Gartner
24
Class-4
24
Class-4
N.A.
N.A.
Number of students 25 25
Expected avg. test score* -0.3 -0.3
Actual avg. test score* -0.46 -0.46
Value-added -0.15 -0.15
Paul Lopin and Stacee Nunez
N.A.
N.A.
51
Class-3
51
Class-3
Number of students 26 26
Expected avg. test score* -0.31 -0.31
Actual avg. test score* -0.31 -0.31
Value-added 0.0 0.0
Withley Isaac
0
Class-5
0
Class-5
N.A.
N.A.
Number of students 18 18
Expected avg. test score* -1.17 -1.17
Actual avg. test score* -1.64 -1.64
Value-added -0.47 -0.47
Lina Cohen
11
Class-4
0
Class-5
N.A.
N.A.
Number of students 57 124
Expected avg. test score* 0.15 0.18
Actual avg. test score* -0.11 -0.23
Value-added -0.26 -0.4
Steven Hayes
N.A.
N.A.
82
Class-2
71
Class-3
Number of students 84 141
Expected avg. test score* 0.06 0.07
Actual avg. test score* 0.19 0.13
Value-added +0.13 +0.06

8th Grade

Teacher Math 2010 Math Career English 2010 English Career
Richard Gartner
20
Class-4
21
Class-4
N.A.
N.A.
Number of students 26 326
Expected avg. test score* -0.19 0.19
Actual avg. test score* -0.37 0.05
Value-added -0.17 -0.14
Omesh Prashad
54
Class-3
70
Class-3
N.A.
N.A.
Number of students 76 284
Expected avg. test score* 0.14 0.12
Actual avg. test score* 0.16 0.23
Value-added +0.02 +0.11
Rebecca Rotelli
N.A.
N.A.
67
Class-3
72
Class-3
Number of students 85 131
Expected avg. test score* 0.17 -0.3
Actual avg. test score* 0.23 -0.23
Value-added +0.06 +0.07
Jesse Riley
71
Class-3
83
Class-2
N.A.
N.A.
Number of students 11 55
Expected avg. test score* -0.53 -1.07
Actual avg. test score* -0.39 -0.86
Value-added +0.14 +0.21
Michelle Edelson
N.A.
N.A.
37
Class-3
37
Class-3
Number of students 22 22
Expected avg. test score* -0.52 -0.52
Actual avg. test score* -0.57 -0.57
Value-added -0.05 -0.05

* Test scores are reported as standard deviations above/below the citywide mean.

Related
About the Data

What is being measured?

The ratings on this page reflect the city’s effort to isolate the effect of individual teachers on student performance. In this case, the measurement is based on math and English scores on New York State standardized tests. Each teacher was assigned an “expected” score based on the past performance and demographics of his or her students. This expected score is then compared to the students’ actual test results. The difference is considered the “value added” by the teacher.

Does a low rating mean my child has a bad teacher?

Not necessarily. Critics of the rankings point to their many deficiencies and caveats. One of them is that the higher teachers rank one year, the harder it is for them to sustain their high ranking by showing significant progress in students the next year. Critics also say there are aspects of a child’s life — or distractions on test day — that the numbers cannot capture: supportive parents, a talented principal, the help of a tutor, allergies or a relentlessly barking dog outside the classroom.

Why are some ratings more precise than others?

The scores here are estimates based on a complex formula, and the estimates carry with them a margin of error. The more test scores that are incorporated in the formula, the smaller the error margin, which is why single-year ratings have a bigger margin than those calculated for a teacher’s career. Error margins, which are called the “confidence interval” in these reports, can range widely.

Additional Q&A »

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