https://phys.org/news/2018-06-teachers-view-immigrant-minority-parents.html

To draw these conclusions, Ho, who studies the sociology of education and family, and Penn alum Hua-Yu Sebastian Cherng, now an assistant professor of international education at NYU, turned to the Education Longitudinal Study of 2002, a nationally representative survey conducted by the U.S. Department of Education.

Existing studies of this type often analyze data focused either on what parents report about their own in-school involvement or what teachers believe about such contributions. This dataset, however, contains both, including independent surveying of math and English teachers, as well as student responses.