APPENDIX B
=======1998-99 ERB Testing Report:
=============6th
Grade | 7th Grade | 8th
Grade | 9th Grade | 10th
Grade
Each spring all students in grades six through ten take the Educational
Records Bureau’s CTP III standardized test (ERB’s). Through a series of
sub-tests, the ERB’s measure students’ verbal and quantitative ability as
well as their achievement in academic areas related to these abilities. These
achievement areas include general mathematical skills, algebra, geometry,
writing, reading comprehension, and vocabulary.
This report presents a picture of our students’ academic ability and
achievement in relation to their peers. The ERB tests provide three different
reference groups with whom to compare our students:
a. National: students in general, including students in large urban
and small rural
schools.
b. Suburban
c. Independent schools:
including almost all members of the National
Association of Independent Schools and is the reference group most similar to Cary Academy .
Unlike most other standardized tests given to secondary school students, the
ERB assesses students’ ability as well as achievement. Students receive a
measurement of their quantitative and verbal ability at the time of the test.
This provides one indication of how well students, and also classes and grades,
are achieving, given their ability. It also gives the school an indication of
how well it is teaching particular academic skills.
Also presented in this report are the results from the ERB Writing Assessment
Program. This program asks students to write an essay in response to a specified
prompt, and then evaluates students’ writing in six different skill areas. It
is designed to be a more authentic and accurate gauge of students’ writing
ability than typical multiple choice standardized tests.
The following reports the results of each grade from the tests given in
April, 1999.
Grade 6 (Appendix
B)
Quantitative Ability
|
Percentile Ranks Scale Scores |
Percentile Ranks Scale Scores |
Percentile Ranks Scale Scores |
Percentile Ranks Scale Scores |
|
Cary Academy Norms % |
Nat’l Norms % |
Suburban Norms % |
Independent School Norms % |
|
90 |
99 |
97 |
94 |
|
75 |
99 |
89 |
83 |
|
50 |
95 |
75 |
63 |
|
25 |
90 |
61 |
45 |
|
10 |
78 |
42 |
27 |
Last year’s 6th grade demonstrated particularly strong
quantitative ability. A 6th grade student right in the middle of the
6th grade class at Cary Academy last year had stronger quantitative
ability than 95% of the students around the country (national norms) and
stronger quantitative ability than 75% of students at suburban public schools
and 63% of students at other independent schools.
The bottom quartile at Cary Academy equates with the 90th percentile
nationally and 45th percentile of independent schools. Our 6th
grade’s strength in quantitative ability means that a student coming into Cary
Academy’s 6th grade last year from a Wake County Public School who
has been at the top of her class in math, may well find she is in the middle of
her class at Cary Academy.
Mathematics
|
Percentile Ranks Scale Scores |
Percentile Ranks Scale Scores |
Percentile Ranks Scale Scores |
Percentile Ranks Scale Scores |
|
Cary Academy Norms % |
Nat’l Norms % |
Suburban Norms % |
Independent School Norms % |
|
90 |
99 |
94 |
90 |
|
75 |
97 |
82 |
74 |
|
50 |
95 |
73 |
61 |
|
25 |
85 |
49 |
33 |
|
10 |
73 |
34 |
18 |
Considering our 6th grader’s ability last year, how well did
they achieve? They achieved at levels we would expect given their ability. At
comparable percentiles we continue to score higher than national, suburban and
independent school groups. The bottom quartile achieved at the 85th
percentile nationally and the 33rd percentile on independent school
norms. Note that while this is slightly less than their ability differences, it
is not statistically significant.
Verbal Ability
|
Percentile Ranks Scale Scores |
Percentile Ranks Scale Scores |
Percentile Ranks Scale Scores |
Percentile Ranks Scale Scores |
|
Cary Academy Norms % |
Nat’l Norms % |
Suburban Norms % |
Independent School Norms % |
|
90 |
99 |
93 |
89 |
|
75 |
95 |
83 |
75 |
|
50 |
84 |
66 |
51 |
|
25 |
75 |
52 |
35 |
|
10 |
62 |
33 |
17 |
In the area of verbal ability, a Cary Academy 6th grader right in
the middle of the class (the 50th percentile) scores higher than 84%
of students nationally, 66% of students at suburban schools, and 51% of her
independent school peers.
Reading Comprehension, Mechanics, and Vocabulary
Achievement results for our 6th graders in the areas that relate
to verbal ability (reading comprehension, writing, and vocabulary) fall right in
line with what we would expect given their ability. In short, our 6th
graders last year achieved better than students nationally and in suburban
schools and at the same level as students at other independent schools.
Writing Assessment
|
Cary Academy |
Suburban School Norms |
Independent School Norms |
|
90 |
97 |
92 |
|
75 |
89 |
76 |
|
50 |
78 |
60 |
|
25 |
60 |
39 |
|
10 |
40 |
22 |
On the writing assessment, at each percentile reported our 6th
graders scored higher than suburban students and slightly higher the independent
school students.
Grade 7 (Appendix
B)
Quantitative Ability
|
Percentile Ranks Scale Scores |
Percentile Ranks Scale Scores |
Percentile Ranks Scale Scores |
Percentile Ranks Scale Scores |
|
Cary Academy Norms % |
Nat’l Norms % |
Suburban Norms % |
Independent School Norms % |
|
90 |
99 |
92 |
90 |
|
75 |
97 |
80 |
74 |
|
50 |
90 |
62 |
51 |
|
25 |
85 |
44 |
31 |
|
10 |
59 |
21 |
10 |
Cary Academy’s 50th percentile at grade 7 equates to the 90th
percentile nationally, the 62nd percentile in suburban schools, and the 51st
percentile in independent schools.
General Mathematics Subtest
|
Percentile Ranks Scale Scores |
Percentile Ranks Scale Scores |
Percentile Ranks Scale Scores |
Percentile Ranks Scale Scores |
|
Cary Academy Norms % |
Nat’l Norms % |
Suburban Norms % |
Independent School Norms % |
|
90 |
99 |
93 |
90 |
|
75 |
98 |
78 |
71 |
|
50 |
93 |
63 |
51 |
|
25 |
84 |
44 |
29 |
|
10 |
72 |
29 |
15 |
Cary Academy’s 50th percentile at grade 7 achieved at the 93rd
percentile nationally, 63rd percentile of suburban schools, and 51st
percentile of independent schools. These results are what we would expect given
their ability, which is indicated above.
Algebra Subtest
|
Percentile Ranks Scale Scores |
Percentile Ranks Scale Scores |
Percentile Ranks Scale Scores |
|
Cary Academy Norms % |
Suburban Norms % |
Independent School Norms % |
|
90 |
97 |
91 |
|
75 |
93 |
77 |
|
50 |
91 |
73 |
|
25 |
76 |
50 |
|
10 |
67 |
31 |
Our 7th graders last year who were accelerated into the Algebra I
course achieved quite well on the ERB Algebra I achievement test. The 7th
grader scoring in the middle of our 7th grade Algebra class received
a higher score than 91% of 7th graders at suburban schools taking the Algebra
test and 73% of the independent school 7th graders who took this
test. The chart above shows that across the board our seventh grade algebra
students scored higher than their 7th grade peers at suburban and
independent schools.
Verbal Ability
|
Percentile Ranks Scale Scores |
Percentile Ranks Scale Scores |
Percentile Ranks Scale Scores |
Percentile Ranks Scale Scores |
|
Cary Academy Norms % |
Nat’l Norms % |
Suburban Norms % |
Independent School Norms % |
|
90 |
99 |
95 |
92 |
|
75 |
97 |
85 |
78 |
|
50 |
89 |
70 |
60 |
|
25 |
75 |
52 |
39 |
|
10 |
66 |
40 |
27 |
Reading Comprehension, Mechanics, and Vocabulary
Our 7th graders performed as expected given their ability on the
vocabulary, reading comprehension and writing mechanics achievement tests, with
percentiles being nearly identical to the verbal ability results. The one
exception appeared in writing mechanics where our scores were not quite as
strong as independent school scores for the bottom half of our 7th grade.
At the 50th, 25th and 10th percentile our
students placed in the 48th, 28th and 18th
percentiles. While these percentiles are very similar, given our students
ability (60th, 39th and 27th percentile) we
might expect them to be higher.
Writing Assessment
|
Cary Academy |
Suburban School Norms |
Independent School Norms |
|
90 |
96 |
95 |
|
75 |
90 |
86 |
|
50 |
78 |
69 |
|
25 |
57 |
46 |
|
10 |
44 |
31 |
On the writing assessment our 7th graders performed as expected
given their ability, with slightly better (but not statistically significant)
than expected scores on the independent school norms.
Grade 8 (Appendix
B)
Quantitative Ability
|
Percentile Ranks Scale Scores |
Percentile Ranks Scale Scores |
Percentile Ranks Scale Scores |
Percentile Ranks Scale Scores |
|
Cary Academy Norms % |
Nat’l Norms % |
Suburban Norms % |
Independent School Norms % |
|
90 |
99 |
95 |
94 |
|
75 |
99 |
87 |
82 |
|
50 |
96 |
73 |
66 |
|
25 |
87 |
57 |
45 |
|
10 |
66 |
32 |
17 |
Last year’s 8th grade also exhibited particularly strong
quantitative ability. Cary Academy’s 50th percentile at grade 8
equated to the 96th percentile nationally, the 73rd percentile in
suburban schools, and the 66th percentile in independent schools.
Cary Academy’s bottom quartile finds itself at the 87th percentile
nationally, the 57th percentile in a suburban setting, and the 45th
percentile at other independent schools.
Mathematics
On the mathematics sub-test Cary Academy 8th graders performed up
to their strong ability, with our 50th percentile equating to the 99th
percentile nationally, 77th percentile suburban, and 71st
percentile independent school. Of particular note, at each given percentile
level Cary Academy students scored higher than their independent school peers.
39 8th graders took the Algebra I sub-test. Interestingly, our 50%
equated with only the 55% of both suburban and independent schools. The picture
was vastly different for the 14 8th graders who took the Geometry
sub-test. Here Cary Academy’s 50th percentile fell at the 91st
percentile on suburban and 66th percentile on independent school
norms.
Verbal Ability
|
Percentile Ranks Scale Scores |
Percentile Ranks Scale Scores |
Percentile Ranks Scale Scores |
Percentile Ranks Scale Scores |
|
Cary Academy Norms % |
Nat’l Norms % |
Suburban Norms % |
Independent School Norms % |
|
90 |
99 |
99 |
97 |
|
75 |
99 |
94 |
88 |
|
50 |
95 |
82 |
71 |
|
25 |
83 |
60 |
40 |
|
10 |
70 |
38 |
19 |
In the area of verbal ability, a Cary Academy 8th grader right in
the middle of the class (the 50th percentile) scores higher than 95%
of students nationally, 82% of students at suburban schools, and 71% of her
independent school peers.
Reading Comprehension, Mechanics, and Vocabulary
Cary Academy 8th graders performed as expected on the verbal
achievement sub-tests given their ability. The table below gives our 50%
percentile score compared to other groups in all three areas.
| |
Reading Comprehension |
Writing Mechanics |
Vocabulary |
|
National Schools |
96% |
89% |
unavailable |
|
Suburban Schools |
76% |
72% |
73% |
|
Independent Schools |
65% |
62% |
61% |
Writing Assessment
The chart below indicates how well Cary Academy 8th graders
performed on their writing task for the ERB’s. Of particular note, a student
in the middle of our 8th grade last year wrote better than nearly
three quarters of her peers at independent schools and 84% of her peers at
suburban public schools. Students at the lower end of the 8th grade
class also achieved strong results with their writing. The bottom quarter at
Cary Academy scored as well as almost half the students at other independent
schools!
|
Cary Academy |
Suburban School Norms |
Independent School Norms |
|
90 |
95 |
91 |
|
75 |
94 |
90 |
|
50 |
84 |
73 |
|
25 |
66 |
48 |
|
10 |
53 |
36 |
Grade 9 (Appendix
B)
Quantitative Ability
|
Percentile Ranks Scale Scores |
Percentile Ranks Scale Scores |
Percentile Ranks Scale Scores |
Percentile Ranks Scale Scores |
|
Cary Academy Norms % |
Nat’l Norms % |
Suburban Norms % |
Independent School Norms % |
|
90 |
99 |
94 |
90 |
|
75 |
98 |
86 |
78 |
|
50 |
89 |
69 |
56 |
|
25 |
69 |
42 |
27 |
|
10 |
57 |
27 |
14 |
A student right in the middle of the 9th grade class at Cary
Academy last year had stronger quantitative ability than 89% of the students
around the country (national norms.)
Mathematics
|
Percentile Ranks Scale Scores |
Percentile Ranks Scale Scores |
Percentile Ranks Scale Scores |
Percentile Ranks Scale Scores |
|
Cary Academy Norms % |
Nat’l Norms % |
Suburban Norms % |
Independent School Norms % |
|
90 |
99 |
96 |
94 |
|
75 |
99 |
87 |
81 |
|
50 |
97 |
73 |
63 |
|
25 |
87 |
47 |
32 |
|
10 |
78 |
35 |
21 |
While the student at the 50% at Cary Academy in quantitative ability fell at
the 89th percentile nationally, this student scored better than 97%
of students nationally on this achievement sub-test. Also of note was that the
bottom quartile at Cary Academy achieved at the 87th percentile
nationally, 47th percentile on suburban norms, and 32nd
percentile of independent school norms This
indicates that our 10th grade class has achieved well in mathematical
computational and problem solving skills.
While the results on the Geometry subtest taken by 10th graders
matched fairly closely their quantitative ability scores, their results on the
subject test for Algebra I were not as strong as we might expect. Our 50th
percentile tested out at the 47th percentile on suburban norms and
the 29th for independent school norms. At all levels our students did
significantly lower than their independent school peers.
Verbal Ability
|
Percentile Ranks Scale Scores |
Percentile Ranks Scale Scores |
Percentile Ranks Scale Scores |
Percentile Ranks Scale Scores |
|
Cary Academy Norms % |
Nat’l Norms % |
Suburban Norms % |
Independent School Norms % |
|
90 |
99 |
95 |
92 |
|
75 |
96 |
85 |
76 |
|
50 |
92 |
72 |
59 |
|
25 |
79 |
48 |
33 |
|
10 |
65 |
27 |
15 |
Cary Academy’s 9th grade showed particularly strong verbal
ability. A Cary Academy 9th grader right in the middle of the class
scored higher than 92% of students nationally, 72% of students at suburban
schools, and 59% of her independent school peers.
Reading Comprehension, Mechanics, and Vocabulary
The table below gives Cary Academy’s 50th percentile score compared to
other groups on three verbal achievement sub-tests that correspond with verbal
ability.
| |
Reading Comprehension |
Writing Mechanics |
Vocabulary |
|
National Schools |
85% |
83% |
unavailable |
|
Suburban Schools |
68% |
62% |
60% |
|
Independent Schools |
54% |
48% |
46% |
While our students performed slightly lower than expected given their ability
testing, these differences are not statistically significant.
Writing Assessment
The chart below indicates how well Cary Academy 9th graders
performed on their writing task for the ERB’s. Of interest, while the bottom half of our 9th grade class
scored higher than their suburban and independent school peers, the top half of
the grade scored below their independent school peers.
|
Cary Academy |
Suburban School Norms |
Independent School Norms |
|
90 |
90 |
84 |
|
75 |
77 |
65 |
|
50 |
71 |
58 |
|
25 |
56 |
41 |
|
10 |
44 |
30 |
Grade 10 (Appendix
B)
Quantitative Ability
|
Percentile Ranks Scale Scores |
Percentile Ranks Scale Scores |
Percentile Ranks Scale Scores |
Percentile Ranks Scale Scores |
|
Cary Academy Norms % |
Nat’l Norms % |
Suburban Norms % |
Independent School Norms % |
|
90 |
99 |
96 |
94 |
|
75 |
99 |
91 |
88 |
|
50 |
94 |
72 |
63 |
|
25 |
72 |
42 |
29 |
|
10 |
55 |
24 |
13 |
Last year’s 10th grade exhibited strong quantitative ability.
Cary Academy’s 50th percentile at grade 10 equated to the 94th
percentile nationally, the 72nd percentile in suburban schools, and the 63rd
percentile in independent schools.
Mathematics
10th graders performed up to their ability on this achievement
sub-test, with our 50th percentile equating with the 99th
percentile nationally, the 74th on suburban norms, and the 66th
on independent school norms.
On the Geometry achievement sub-test, our 10th graders did not
perform particularly well. Our 50th percentile equated with the 48th
percentile on suburban norms and the 37th percentile on independent
school norms.
On the Algebra II achievement sub-test, our 10th graders met
expectations with the 50th percentile falling at the 63rd
percentile on suburban and 61st percentile of independent school
norms.
Verbal Ability
|
Percentile Ranks Scale Scores |
Percentile Ranks Scale Scores |
Percentile Ranks Scale Scores |
Percentile Ranks Scale Scores |
|
Cary Academy Norms % |
Nat’l Norms % |
Suburban Norms % |
Independent School Norms % |
|
90 |
99 |
95 |
90 |
|
75 |
96 |
87 |
78 |
|
50 |
93 |
75 |
63 |
|
25 |
83 |
51 |
37 |
|
10 |
69 |
32 |
20 |
10th graders at Cary Academy demonstrated strong verbal ability,
with the bottom half of the grade scoring particularly well when compared to its
independent school counterpart.
Reading Comprehension, Mechanics, and Vocabulary
The scores on these subtests follow fairly closely the same pattern as the
ability testing, with vocabulary receiving the highest scores and writing
mechanics the lowest. This relative weakness seemed to be confirmed on the 10th
grade’s performance on the writing assessment.
Writing Assessment
The chart below indicates how well Cary Academy 10th graders
performed on their writing task for the ERB’s. Further research will lead to a
better idea why our students did not do better on this test. Given their verbal
ability, this class is capable of out- performing both peer groups listed below.
|
Cary Academy |
Suburban School Norms |
Independent School Norms |
|
90 |
76 |
68 |
|
75 |
70 |
61 |
|
50 |
41 |
28 |
|
25 |
24 |
14 |
|
10 |
13 |
6 |
Summary
Given that this was only Cary Academy’s second year taking ERB tests, and
our first year with significant numbers of students taking the tests at each
grade, we are reluctant to draw specific conclusions for the school. Overall, we
are very pleased with how our students performed on these standardized tests
last year. The results clearly indicate that Cary Academy already has
established itself as a school where students achieve well above the national
average and slightly better than independent school students around the country.
On the whole, our students are performing up to their ability and in some areas
slightly better. Over the next few years we will carefully monitor student
progress to identify trends in student learning, and to identify specific
academic skills that are either strong or need further development.
Appendices: A | B
| C | D | E
| F | G | H
| Top
|