Researchers interviewed students weekly to see what fruits, vegetables and grains they ate in the previous 24 hours. Before the study, participants were eating about one ounce of whole grain per day. During the study, students in both groups reported eating more than 6 ounces of grains each day, and those given whole grains reported more than half their grain intake came from whole grains, meeting the 2010 dietary guidelines. Snacks served at school were the most popular grain foods the kids ate. "Encouraging consumption of whole-grain foods that require little to no preparation may be the most effective means of increasing whole grain intake at home," said Radford, now a UF research study coordinator in food science and human nutrition.