This convenient food is a source of protein, iron and a variety of vitamins and minerals. Thanks to their natural supply of such ingredients, hard-boiled eggs are ideal for warding off the mid-day slumps [source: Lawrence].
Boil six or a dozen at a time so you'll have them handy for snacking. Just avoid the temptation to slather them in butter and coat them with salt. Remember, the goal is to raise your test scores and not your cholesterol and blood pressure.
Next up, we'll study a cognitive enhancement food that's usually served in liquid form.