At least 50 percent of the words used in school books, library books, magazines and newspapers come from the Dolch Basic Sight Vocabulary list. Their preschool list includes: a, and, away, big, blue, can, come,down, find, for, funny, go, help, here, I, in, is, it, jump, little, look, make, me, my, not, one, play, red, run, said, see, the, three, to, two, up, we, where, yellow, you.
Education.com has a slightly different list of sight words for preschoolers. They include: a,at,an,and,am,are,can,do,for,go,have,he,here,in,I,is,it,like,look,me,my,no,play,said,see,she,so,the,to,up,we.
Dr. Fry refined the Dolch word list to include nouns. The list includes 600 words, broken into sets of 100, with four groups per set. They are listed in order of frequency. Preschoolers can learn the first group of the first 100: the, of, and, a, to, in, is, you, that, it, he , was, for, on, are, as, with, his, they, I, at, be, this, have, from.