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Student invents new math process

FAIRBORN, Ohio -- Killie Rick explains her new method of solving subtraction of fractions problems, as her teacher, Colin McCabe, puts an example on the chalkboard. She uses negative numbers, which McCabe said he had never seen before. Killie is a seventh-grade student at Mary Help of Christians school here. Her mother is Terri Rick, an employee at nearby Wright-Patterson Air Force Base. (U.S. Air Force photo by Spencer P. Lane)

PHOTO BY: Spencer P. Lane
VIRIN: 031118-F-0000S-008.JPG
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