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Cutoff Points Patrick Traynor, Ph.D., Director of Assessment and Evaluation Colton Joint Unified School District

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Presentation on theme: "Cutoff Points Patrick Traynor, Ph.D., Director of Assessment and Evaluation Colton Joint Unified School District"— Presentation transcript:

1 Cutoff Points Patrick Traynor, Ph.D., Director of Assessment and Evaluation Colton Joint Unified School District www.PatrickTraynor.com Patrick_Traynor@colton.k12.ca.us ACSA Conference November 2, 2006 San Diego Aligning District Assessments to STAR CST Bands

2 Original Cutoffs for ELA Semester 1 Exam 7 th Grade Band% CutoffCutoff Points 1 Far Below Basic 0% - 29.9%0.0 - 19.49 2 Below Basic30% - 49.9%19.5 - 32.49 3 Basic50% - 69.9%32.5 - 45.49 4 Proficient70% - 89.9%45.5 - 58.49 5 Advanced90% - 100%58.5 - 75.0

3 Distribution of 2004-05 Seventh Grade Students (%) In 2004-05 Semester 1 Bands According to 2004-05 ELA CST Band Using Original Cutoffs

4 Distribution of 2004-05 Seventh Grade Students (#) In 2004-05 Semester 1 Bands According to 2004-05 ELA CST Band Using Current Cutoffs

5 Percentage of Kids in Each ELA CST Band Who Received Each Semester Exam Raw Score

6 From Raw Score ELA Semester 1 Grade 7 ELA CST Band NMeanStd. Dev. 5 (Advanced)8958.163.067 4 (Proficient)41752.844.301 3 (Basic) 636 44.176.792 2 ( Below Basic ) 40035.247.801 1 ( Far Below Basic )15328.698.930

7 % Distribution with Means of Students within Each ELA CST Band 58.16 52.84 44.18 35.24 28.69

8 The Four Cut Points on Each Exam Should –Separate the students into five corresponding bands 12345 Far Below Basic Below BasicBasicProficientAdvanced – Optimize % of students who scored in a particular ELA band within their corresponding semester exam band – For example,...

9 % Distribution with Means of Students within Each ELA CST Band 58.16 52.84 44.18 35.24 28.69 Cut point maximizes % of ELA CST Advanced Proficient Kids who receive a placement level of 5 of the End of Semester Exam and... % ELA CST Proficient Kids who receive a 4 on the End of Semester Exam 54321

10 Aligning Bands by Mean and Std. Dev.

11 Calculated Aligned Cutoffs Band% CutoffCutoff Point 1 Far Below Basic 0% - 49.5%0.0 - 32.18 2 Below Basic49.6% - 61.5%32.19 – 40.01 3 Basic61.6% - 76.1%40.02 – 49.48 4 Proficient76.2% - 86.1%49.49 – 55.94 5 Advanced86.2% - 100%55.95 - 65.0

12 In 2004-05 Semester 1 Bands According to 2004-05 ELA CST Band Using Aligned Cutoffs Distribution of 2004-05 Seventh Grade Students (%)

13 In 2004-05 Semester 1 Bands According to 2004-05 ELA CST Band Using Aligned Cutoffs Distribution of 2004-05 Second Grade Students (#)

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