Running Head: ERROR PATTERNS WITH FRACTION CALCULATIONS 1 Error Patterns with Fraction Calculations at Fourth Grade as a Function of Students’ Mathematics Achievement Status Robin F. Schumacher Instructional Research Group Amelia S. Malone Vanderbilt University in press @ Elementary School Journal Accepted for publication February 2, 2017 This research was supported in part by Grant R324C100004 from the Institute of Education Sciences in the U.S. Department of Education to the University of Delaware, with a subcontract to Vanderbilt University and by Award Number R24HD075443 and by Core Grant HD15052 from the Eunice Kennedy Shriver National Institute of Child Health and Human Development Vanderbilt University. The content is solely the responsibility of the authors and does not necessarily represent the official views of the Institute of Education Sciences, the U.S. Department of Education, the Eunice Kennedy Shriver National Institute of Child Health and Human Development, or the National Institutes of Health.