Successful schedule mastering requires student's high mental efforts. Studying little people are not only accomplishing the hard work, but growing and developing physically. All these processes require the proper nutrition, which could meet metabolic needs of an organism. The author of that paper tried to substantiate the program of schoolchildren's rational nutrition scientifically. As author noted, the program had been built up on the base of analytical facts. The program contains the most important information concerning a day-time nutrition, foodstuffs, chemical contents of food an so on. Notes and recommendations for school-teachers, pedagogy-workers, school's medical staff are also represented in the article.