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CDAS
As schools
and districts become increasingly accountable for raising student
achievement, the need for high quality classroom diagnostic tools has become
imperative. National and state testing results shared with classroom
teachers on a yearly basis are insufficient for making strategic
instructional decisions on a day to day basis. While many districts and
schools have moved to “benchmark” or “interim” assessments, given on a more
frequent basis (quarterly, semester, or 6-8 week intervals), the cumulative
nature of such tests are wholly inadequate for measuring student mastery of
individual content standards, and fail to provide student achievement data
in a timely manner.
For the
past three years, Life Long Learning & Associates has worked with schools
and districts in California, Utah and Illinois to develop a comprehensive
set of classroom diagnostic tools. The development of a CDAS™ (Classroom
Diagnostic Assessment System) in every instance has resulted in higher
student achievement. These results have been accomplished by increasing the
alignment between state standards, instructional decisions, the use of
instructional materials, and formative classroom assessments.
The
development of a CDAS™ system creates an opportunity to engage teams of
teachers in authentic professional growth activities with immediate impact
on classroom room practices. As a professional learning community, teacher
teams learn to unpack their content standards to reveal the student
achievement targets that are often implied rather than stated in state
standards. Furthermore, teams learn how to create more valid and rigorous
classroom assessments by applying the standards for test construction used
by the Educational Testing Service (ETS), as well as Life Long Learning &
Associates design criteria. Teachers involved in the development process
emerge as leaders and staff developers for their colleagues.
Overview of
CDAS Process
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TASK |
PURPOSE |
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Determine the standard(s) to be
assessed and how they should be interpreted (by
unpacking/deconstructing) |
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Agreement by
stakeholders on which standards or components of the standard are
important.
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Not all standards
are equal in terms of developing student understanding of curriculum
content.
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Most standards are
subject to multiple interpretation by teachers, therefore, if
agreement is not reached, students in different classes will not have
the same educational experience (for better or worse, depending on the
teacher)
- Need to find
agreement on the essential elements of a standard (knowledge,
skills/understanding, reasoning)
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Locate released items from state and
nationally normed tests. |
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These items have
typically undergone a rigorous field test and review before being
accepted into an item bank
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Many of the
questions are written to assess more than knowledge and comprehension
(require higher order thinking)
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Many state and
national tests (college board, AP, NAEP, SAT) have been written by
professional test writers
- Be careful when
using item banks provided by a publisher…these questions typically
have not undergone a rigorous quality control. They typically focus on
lower order think skills with an emphasis on comprehension of academic
terminology and/memorization of terms.
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Analyze each released item for
alignment to standards and its cognitive level. |
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Trains the mind to
become more critical in analyzing and selecting questions that are
written at higher cognitive levels (Bloom’s), vs. those that focus on
lower levels.
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Helps participants
negotiate and come to agreement in terms of what is important to
assess vs. what is simply easy to assess
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Helps participants
to learn how to write quality prompts (assumes that released items are
decent models) and distracters
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Improves the
participant’s ability to write test items.
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Determine
the schematic for the assessment tool to be designed:
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Establishes the
number of questions per standard – allotting more questions to more
important standards or objectives
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Establish a level
of rigor students will be expected to perform, rather than allowing
the availability of questions to set the standard for rigor by
default.
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Determine the
format to be used (# of Multiple Choice questions, Open-ended, short
answer etc.)
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Standardize the
“look” of the assessment tool – Consider formatting the tool similar
to the state or national assessment your students will be expected to
take.
- Layout the
answer key to ensure equal distribution of distracters and the absence
of a predictable pattern.
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| Craft
the assessment tool to the design specifications |
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Consider the first
design to be a draft. It is extremely rare that one can design both a
valid and reliable tool the first time. That’s why it takes most
testing companies 2-3 years to develop a decent tool for evaluating
student achievement. Yet teachers and schools routinely evaluate and
make judgments about student achievement based on test items that may
be flawed and poorly designed as a result of limited, or no, quality
control.
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Select appropriate
test items from released items collected earlier in the process and
modify as needed.
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Write test items to
fill in gaps where no released items are found. Use criteria and
guidelines provided by LLL for writing new items.
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Collegial Review of Draft |
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Unless you have
considerable training and experience writing high quality selected
response questions (i.e. you do this for a living), accept the fact
that you will probably write a few questions that have poor prompts,
unclear distracters, are cognitively inappropriate, poorly worded, or
worse, simply do not assess what they are suppose to assess. You need
your colleagues and their “eyes” to help you see some of these
shortcomings. Nobody’s perfect!
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If your colleagues
are going to use the assessment tool you have designed they should at
least have some opportunity for input.
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| Pilot
the Assessment in multiple classrooms and collect student Work
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The field test
provides student data that will be used to identify questions that
might require additional revision
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The results of the
field test will be helpful to establish performance bands (performance
standard for mastery) during the next step of the process.
- Provides
initial data a teacher can use to identify re-teaching targets,
despite the fact that some of the questions may later be determined to
be invalid (in other words, it isn’t a wasted effort).
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Conducting an item analysis |
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Reveals patterns in
student responses, and therefore, their thinking
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Reveals items that
may need to be revised or eliminated.
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Reveals re-teaching
targets (what needs to be re-taught, and who).
- Data needed to
establish performance bands (determine how to interpret scores, for
example, “what score is needed to be considered “proficient”?)
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Establish performance bands for the assessment |
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Establishes “cut
scores” based on (1) professional agreements among users of what
constitutes mastery
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Establishes “cut
scores” based on expectation rather than arbitrary scores (i.e. 70%=C)
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Establishes “cut
scores” based on the rigor of the test, conceptual difficulty,
importance of the standard relative to other standards, and student
performance.
- Eliminates
artificial grading scales that assume all assessments are
qualitatively identical.
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Copyright 2007 W. Chalk. Life Long Learning & Associates.
All rights reserved. Duplication of this material is strictly
prohibited unless permission is granted by Life Long Learning & Associates.
P.O. Box 2804 Blue Jay, CA 92317 (909) 337-0343
www.lllearning.net
Created for Pacific HS. San Bernardino, CA.
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