Study 40 More Hours a Week to Raise Your Grades, Research Suggests

Most students would agree that raising a grade-point average is much easier said than done.

Now Carl R. Zulauf, a professor of agriculture, environment, and development economics at Ohio State University, has explained why.

Mr. Zulauf and Amy Gortner Lahmers, a graduate student in educational leadership at Miami University, in Ohio, examined the study habits and academic performance of 79 students in three agricultural-economics courses at a large Midwestern university. The

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