Harackiewicz, J. M., Rozek, C. S., Hulleman, C. S., & Hyde, J. S. (2012). Helping parents to motivate adolescents in mathematics and science: An experimental test of a utility-value intervention. Psychological Science, 23(8), 899-906.
Mailing brochures to parents and creating a website highlighting the usefulness of math and science courses and how to talk with adolescents about this increased students' enrollment in math and science courses in the last two years of high school. In a long-term follow-up, the treatment raised math and science scores on a college preparatory exam (the ACT) by 12 percentile points (Rosek et al., 2017).