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TVAASTennessee
Value-Added Assessment System
Office ofAssessment, Evaluation, & Research
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What is TVAAS?
TVAAS stands for Tennessee Value-Added Assessment System.*Based on SAS’s Education Value-Added Assessment System (EVAAS) and the statistical methodology of Dr. William Sanders.
TVAAS is a statistical method used to measure the influence of a district or school on the academic progress (growth) rates of individual students or groups of students from year-to-year.
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Statistical methodology used in value-added analysis is very complicated.A student’s growth pattern is determined using all available previous existing assessment data for that student (all grades, all subjects). However, the concept behind it is very simple and straightforward…Use a student’s existing assessment data to produce measures of progress unique to that student.
What is TVAAS?
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The TVAAS method uses previous test score data to plot a “growth pattern” for students. Think of academic growth in terms of a child’s physical growth.
What is TVAAS?
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20
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40
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1 2 3 4 5 6
Age in Years
Growth Chart
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TVAAS is….
Projected Score vs. Observed Score
Projected Score – based on all of the student’s past state test scores plus student receiving an average Tennessee schooling.
Observed Score – actual score on most recent test.
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How did it all begin?
First developed for Tennessee by Dr. William Sanders.1992 – Tennessee Education Improvement ActIncreased school funding using increased sales taxesDemand for increased accountabilityTVAAS set up
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Since then…
Since 1992, TVAAS has tracked each of Tennessee’s students…Grades 3-12… every subject… every grade… every teacher…That’s over 26 million records! Largest student assessment database ever assembled.SAS located in Cary, North Carolina, provides the statistical analysis of the data. SAS is the world’s largest privately held software company.
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Students begin school at different places and progress at different rates. Yet with AYP, all students are expected to achieve the same level of academic proficiency level.NCLB says that ALL students must reach proficiency in reading and math by 2014.AYP (Adequate Yearly Progress) is measured for:
All studentsAll major racial/ethnic groupsLow-income studentsLimited English Proficient studentsStudents with Disabilities
Why do we need TVAAS?
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Why do we need TVAAS?
Proficiency is measured by the performance of students at a single point in time and how well those students perform against a set of standards. Simply put, proficiency levels only indicate whether or not a student met a certain target.Growth is measured by how much gain or progress an individual student or group of students make over time. Growth measures do not assume all students start the school year at the same academic level.
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Achievement AND Growth
By measuring the academic achievement of students and the academic growth of students, schools and teachers will have a more comprehensive picture of the effectiveness in raising student proficiency.
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TVAAS Website
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TVAAS Public Site
TVAAS Public Site can be accessed at https://tvaas.sas.com/evaas/public_welcome.js
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EMBARGOED INFORMATION: The 2010 value-added results reported at this site are presently not available to the media or to the public. The public release will come from the Tennessee Department of Education. Your restricted access will allow you to use the information reported in your decision making within your system or school.
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TVAAS Public SiteTVAAS Public Site can be accessed at
https://tvaas.sas.com/evaas/public_welcome.jsp
Reports available on public site:
State Report
School Search
System Value Added
Value Added Summary
System Progress Report
School Value Added
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• High School• Uses mean
observed minus mean predicted score = mean difference or the school effect
• Scores are expressed in scale scores.
• Growth Standard is based on the state mean of the year the test was administered.
• Elementary-Middle• Compares NCE’s
to the Growth Standard
• Scores are expressed in state NCE’s
• Growth Standard based on 1998.
Report Differences High School vs. Elementary-Middle
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Understandings
Gain is the difference between the performance of a student or cohort of students in consecutive years.Growth Standard is the minimal acceptable measure of growth for experience from one year of schooling for each student.NCE (Normal Curve Equivalent) Score is a score that indicates position of a scaled score from any distribution on a reference scale so that comparisons between different scores from different years can be made.
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Understandings
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Restricted Site Log-In https://tvaas.sas.com/evaas/signin.jsf
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The Navigation Bar
Click on “Help” to
access information about each page or to view/print
the Resource
Guide.
Be sure to use Back and Print tabs on the website not on your browser.
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The Navigation Bar
Click on “Reports” Tab to see
selection of different reports
available.
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AYP Dashboard
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Accelerate I, II, and Advanced
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District
School
Subgroup
Student
“Drilling Down”
District Value Added Summary ReportsDiagnostic Summary Reports
Performance Diagnostic Summary ReportsSchool
School Value Added ReportsSchool Diagnostic Reports
School Performance Diagnostic ReportsSubgroup
Custom Student ReportsStudent Pattern List
StudentIndividual Student Reports
Projections
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High School Value-Added Report
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Diagnostic Report
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Selecting Subgroups in Diagnostic Report
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Diagnostic Report
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Student List
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Individual Student Report
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Performance Diagnostic Report
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School Search
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Custom Student Report
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Custom Student Report
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Custom Student Report (Saved)
Click to Resort
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Student Projections (Tab)
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Student Pattern List
•Enables you to see how effective the school/teacher has been with the lowest, middle, and highest achieving students in the group you have selected.
•The minimum number of students you can graph is 15.
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Student Pattern ListHigh School
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Student Pattern List
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Questions???
For additional information on TVAAS and value-added professional development opportunities, visit the TDOE website at
http://www.state.tn.us/education/
Or contact the office of Assessment, Evaluation, & Research
(615) 741-0720