 The longest period during a 24-hour day when children go without food is the period from the beginning of sleep at night to the first meal of the following day. Therefore, the morning seems an ideal time to examine those biological factors that result from hunger or fasting and how they affect basic processes that underpin learning and behavior. Underprivileged but otherwise healthy children seem most affected by hunger. Thus, studies are needed to compare children from families of different economic income strata to understand better how a breakfast meal might affect those learning and behavioral processes, and whether the breakfast meal truly has a positive effect on basic learning and behavior. 