References
On Student Growth & Accountability
Damian W. Betebenner
National Center for the Improvement of Educational Assessment
Dover, NH
ETS Praxis Client Conference, Princeton, New Jersey
May 2, 2012
Damian W. Betebenner On Student Growth & Accountability
References
About Me
Dr. Damian Betebenner, PhD
- Senior Associate at the Center for Assessment (NCIEA).
- Developed student growth percentiles and percentile growth
trajectories to help states and educational associations employ
student growth in decision making [Betebenner, 2008,
Betebenner, 2009, Betebenner, 2012].
- Currently refining and sharing these techniques with other
states including Colorado, Massachusetts, Indiana, Nevada,
Hawaii and 25 other states in various stages of
investigation/adoption.
Damian W. Betebenner On Student Growth & Accountability
References
From a Paucity to a Plethora of Data
Data Data Everywhere (The Economist, 2010)
More and better organized data: mega, giga, tera, peta, exa,
zetta, yotta!
Historical records of student achievement.
Linkage of student achievement to student demographics,
teachers, schools, educational programs, . . .
Stakeholder interest in examining student achievement over
time (student growth) derives from data availability.
Damian W. Betebenner On Student Growth & Accountability
References
A Recurring Metaphor
Data as a window and a mirror
Damian W. Betebenner On Student Growth & Accountability
Advanced Reading
High
Achievement
CSAP Reading
● Typical
Scale Score
Proficient Growth
Low
● Level Percentiles
High 66th − 99th
Typical 35th − 65th
Part Proficient
● Low 1st − 34th
Unsatisfactory
Grade 3 Grade 4 Grade 5 Grade 6 Next Year
Scale Score 462 539 563 609
Achievement Level Unsatisfactory Part Proficient Part Proficient Proficient Achievement
Growth Percentile 66 66 90
Growth Level High High High Growth
References
Student Growth Percentiles
2007 Began develop of the Colorado Growth Model (student
growth percentiles).
2008 Began work with Indiana on development of growth model.
2008 Successfully application of Colorado Growth Model
(criterion-referenced component) as part of growth model
pilot program.
2009-2010 Began/continued work with approximately two-dozen other
states on developing state growth models.
2010 Worked with states on incorporating growth into RttT
applications and with successful states on their use
(Massachusetts, Georgia, New York, Rhode Island).
2011 Worked with a number of states on incorporating student
growth percentiles into the ESEA waiver applications and
teacher evaluation systems.
Damian W. Betebenner On Student Growth & Accountability
References
About the growth model
The Student Growth Percentiles Methodology is a norm- and
criterion-referenced growth analysis method.
The norm-referenced component of the model is the student growth
percentile which indicates the relative growth a student makes.
The criterion-referenced component of the model is the student
growth percentile target which indicates the amount of growth
required by the student to reach/maintain desirable achievement
goals in a specified time frame. For example, catching-up to
proficiency within 3 years.
The norm- and criterion-referenced components together allow
stakeholders to understand what is, what should be, and what is
reasonable simultaneously.
The goal of the metric was to assist states to move beyond debates
over what thermometer is best to discussions of how best to use the
thermometer.
Damian W. Betebenner On Student Growth & Accountability
References
Built to maximize sharing
A number of analytic tools (for doing calculations) and visualization tools
have been developed with the goal to promote maximum sharing. Data
isn’t valuable! It’s what one does with data that is potentially valuable!
The analytic tools to calculate all the quantities associated with
student growth percentiles are open source and freely available to
all states.
The visualizations associated with student growth percentiles are
open source for non-commercial use.
Conduct training sessions at national conferences to help other
calculate these quantities (like Indiana) on their own.
Build enhanced visualization and reporting systems to make data
come alive to stakeholders and lead to better stakeholder
engagement with data.
Goal is to re-invent the user experience with education data and
enable a “growth mindset”.
Damian W. Betebenner On Student Growth & Accountability
References
Lessons Learned
On Questions John Tukey
It is better to have an approximate answer to the right question than a precise answer
to the wrong question.
On Statistical Models George E. P. Box
All models are wrong but some are useful.
On Understanding Aristotle
We understand best those things we see emerge from their very beginnings.
On Accountability Sherlock Holmes
It is a capital mistake to theorize before you have all the evidence. It biases the judg-
ment.
On Theories of Action Confucius
Tell me and I will forget, show me and I will remember, involve me and I will understand.
Damian W. Betebenner On Student Growth & Accountability
References
Describing Student Growth
Measuring student growth, even with a vertical scale, is not a simple
task.
Some believe a vertical scale simplifies the task of measuring
student growth.
Even with an interval (or ratio) scale, growth is not easy to interpret.
Consider, for example, height.
A child might grow 4 inches between ages 3 and 4.
4 inches is a well understood quantity.
The 4 inch increase becomes really meaningful only when understood
alongside the growth of other 3 to 4 year olds.
Student growth percentiles were developed to provide a normative
context for describing student growth.
Damian W. Betebenner On Student Growth & Accountability
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References
References
Betebenner, D. W. (2008).
Toward a normative understanding of student growth.
In Ryan, K. E. and Shepard, L. A., editors, The Future of Test-Based
Educational Accountability, pages 155–170. Taylor & Francis, New
York.
Betebenner, D. W. (2009).
Norm- and criterion-referenced student growth.
Educational Measurement: Issues and Practice, 28(4):42–51.
Betebenner, D. W. (2012).
Growth, standards, and accountability.
In Cizek, G., editor, Setting Performance Standards: Foundations,
Methods, and Innovations, pages 439–450. Routledge, New York.
The Economist and Cukier, K. (2010).
Data data everywhere.
Damian W. Betebenner On Student Growth & Accountability
About this copy
On Student Growth & Accountability — ETS, May 2, 2012.
This is an image-based copy of the original beamer slides; builds and animations are flattened.