growth analysis
DESCRIPTION
This presentation was made to the Franklin, MA School Committee during the meeting on 10/13/09.TRANSCRIPT
Measuring GrowthDistrict, School and Student
Performance on MCAS
October 13, 2009
PRESENTED BY
Maureen Sabolinski, Superintendent of Schools
Michele Kingsland-Smith, Director Instructional Services
Bob Lima, Assistant Principal for Academics
What is Growth ?
MCAS: How each student is performing relative to state standards Is John proficient in 6th grade mathematics? Cannot compare John’s scaled scores from year
to year
Growth: Measure of change in an individual student’s performance over time How much did John improve in mathematics
from 5th grade to 6th grade? Did John improve more or less than his
academic peers?
Why Measure Growth?
To improve the validity and the scope of decisions we make using MCAS results Make improvements in curriculum and instruction Target assistance Conduct program evaluations Make accountability determinations
To expand the notion of achievement to include both performance and growth
Achievement = Performance + Growth
New DESE Metric to Measure Growth:Student Growth Percentiles (SGP)
Each student’s rate of change is compared to other students with a similar test score history (“academic peers”)
The rate of change is expressed as a percentile. How much did John improve in mathematics from 5th
grade to 6th grade, relative to his academic peers? If John improved more than 65 percent of his
academic peers, then his student growth percentile would be 65.
Growth Model Key Concepts
Growth is distinct from performance A student can perform at a low level but grow quickly, and
vice versa
Each student is compared only to their academic peers, not to all students statewide All students can potentially grow at the 1st or 99th percentile
Growth is subject-, grade-, and year-specific Different academic peer groups for each subject, grade, and
year Therefore, the same change in scaled scores on different
tests can yield different student growth percentiles
Student Growth Percentile Scale20% Rule of Thumb
Typical student growth percentiles are between about 40 and 60 on most tests.
Students or groups outside this range have exceptionally high or low growth.
Differences of fewer than 10 SGP points are likely not educationally meaningful.
Very low Low Typical High Very high
SGP1–20
SGP21–40
SGP41–60
SGP61–80
SGP81–100
Fan Chart - ELA Growth grades 5- 7
230 230
200
220
240
260
280
Grade 5 Grade 6 Grade 7
MCAS
ELA
sca
led s
core
Advanced
Proficient
Needs Improvement
Warning/Failing
80 to 99
60 to 79
40 to 59
20 to 39
1 to 19
SGP
Student A
230
35%
65%
SGPs between 40 to 59 are typical
2006 2007 2008
Scatter Plot Data ChartGrowth by Performance for Students
0
20
40
60
80
100
0 20 40 60 80 100
ELA median SGP, 2008
EL
A %
pro
ficie
nt o
r ad
van
ced
, 200
8
Higher achieving
Lower growing
Lower achieving
Lower growing
Higher achieving
Higher growing
Lower achieving
Higher growing
Scatter Plot Data Chart Growth by Performance for Grades
0
20
40
60
80
100
0 20 40 60 80 100
Mathematics median SGP, 2008
Mat
h %
pro
ficie
nt o
r ad
van
ced
, 200
8
Higher achieving
Lower growing
Lower achieving
Lower growing
Higher achieving
Higher growing
Lower achievingHigher growing
Grades 4, 5, 6 mathematics – All elementary schools in one district
Growth Distribution ChartSchool by Grade
12
28
8
17
20
9
21
18
14
30
22
18
20
12
52
0% 20% 40% 60% 80% 100%
Grade 4
Grade 5
Grade 6
Percent of students
<20th %ile
21st to 40th %ile
41st to 60th %ile
61st to 80th %ile
>80th %ile
Median SGPsGrade 4: 58Grade 5: 43Grade 6: 83
District Action Plan
Data Warehouse Training In district ACCEPT Collaborative DESE
Role out of District Data Team Administrators & Teacher Leaders Develop Vision for Data USE Develop Instructional Research Questions
