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33 - An Interview with Dr. Thomas Guskey: A Journey through the History of Grading Reform Efforts
The Grading Podcast
Variation in Grading Among Teachers. Published in 1913
A significant discrepancy exists in grading practices among teachers, evidenced by studies showing that 15% of teachers awarded an A grade, while 13% assigned failing grades to the same student paper. Grading variations range considerably, with one paper receiving grades from 65 to 98 and another from 50 to 97. Despite critiques of the original study's focus on writing, which is inherently subjective, a subsequent study found even greater grading variations among math teachers. The discrepancy is attributed to differing approaches, with some teachers strictly grading answers and others offering generous partial credit, leading to a wide spread in scores. This issue is longstanding, as research dating back to 1912 has consistently shown similar grading variance across different educational contexts. Modern replication of these findings continues to reveal a typical score range disparity of at least seven points among educators reassessing the same work, reflecting ongoing inconsistencies in assessment practices.
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