Ohio Department of Education Accountability

Ohio’s Value-added system uses an advanced methodology (Education Value-added Assessment System – EVAAS) initially formulated by William Sanders and further developed by Sanders and colleagues at SAS Institute, Inc. These procedures, while computationally complex, have a substantial body of empirical testing in the research literature to support them. This helps assure the validity and usefulness of the resulting measures as they are used in high stakes applications. In addition to the value-added (school and district effects) measures derived from this methodology, Ohio uses EVAAS to compute its federally approved Growth Model (student level projections for AYP).

• Ohio’s Value Added Model – SAS Technical Report 
         
• SAS-EVAAS Methodology Update 
       
• Scale Stabilization Process – SAS Technical Report
      
• Technical description of Multi-Year and Composite Calculations

Related Research Reports on Value-added

• Measurement of Academic Growth of Individual Students toward Variable and
  Meaningful Academic Standards  (S. Paul Wright, William L. Sanders, June C. Rivers)
   
• Comparisons Among Various Educational Assessment Value-Added Models (William L. Sanders)
   
• An Investigation of Two Nonparametric Regression Models for Value-Added Assessment in Education (S. Paul Wright)
    
• Do Teacher Effect Estimates Persist When Teachers Move to Schools with Different Socioeconomic Environments? (William Sanders, S.Paul Wright, Warren Langevin)

AYP/Growth Information

• Ohio's Growth Proposal, ODE Report submitted to USDOE in October 2006.
  • Addendum to Ohio's Growth Proposal, May 2007