"Grain servings" refers to the amount of grain-based foods you should eat in a meal or a day. It is a way to measure how much of these foods you should consume to have a balanced diet. Full definition
Currently, there is no requirement regarding whole grains, but the proposed rules require that half of grains served must be whole grains. (thelunchtray.com)
While this is half of the total grains servings at the lower end of the range, the proportion decreases as the number of servings increases. (health.gov)
Schools that received the grants reported significantly more dairy and whole grains served during the breakfast grant period. (beyondbreakfast.org)