The US School Breakfast Program [SBP] was established in 1966 for the primary purpose of offering a morning meal to low-income children who would otherwise have none. This blog, written in 2015, is not to mark any 'breakfast' occasion or 'week/day of ...' events but to place together a number of links to research that support a range of investigations. Some may be satisfied by simply clicking on a link and reading what appears on screen. Other investigations may need longer and these links, including Wikipedia, may help.
One of the earliest US studies  into the effects of breakfast on school behaviour and learning suggested that "nervousness was reduced in children by milk given at 9:30am at school ...". By 1989, research reported on the academic effects associated with participation in the SBP showing, "significant improvements in academic functioning among low-income elementary school children". Ten years later and more US research results showed that, "...higher rates of participation in school breakfast programs are associated in the short-term with improved student functioning on a broad range of psychosocial and academic measures."
One study in the UK in May, 2015 states, "... there is a paucity of studies which examine the relationship between breakfast consumption and academic performance and a complete absence of studies in UK school children." This study concluded that, "... the present study provided no evidence that habitual breakfast consumption was associated with a proxy measure of academic performance in the sample of 11- to 13-year-old adolescents studied". "...However, methodological considerations which could account for this disagreement with previous research, were identified."
Another study in the UK in September, 2015 concluded that, "Significant positive associations between self-reported breakfast consumption [by 9-11-year-olds] and educational outcomes were observed".
For more links to research, young people and breakfast visit Search the Research