xi, 59 p. : ill. A print copy of this thesis is available through the UO Libraries. Search the library catalog for the location and call number. / Presenting science fair projects gave students an opportunity to complete a performance assessment that comprised a meaningful task focused on process and subject to standards-based assessment. Students presented science inquiry and engineering design projects to judges at a regional science fair. The judges used the domains of the Potter Rubrics to assess the students' work and assigned a Quality score to each project. Using multiple regression, this study found that the mean scores on the Methods and Analysis domains predicted the mean Quality scores. Analyzing the technical quality of the Potter Rubrics addressed some of the measurement and generalizability concerns about performance assessments. Recommendations for future research and implications for practice were examined. / Committee in charge: Gerald Tindal, Chairperson, Educational Leadership; Paul Yovanoff, Member, Educational Leadership; Leanne Ketterlin Geller, Member, Educational Leadership; David Johnson, Outside Member, Chemistry