Introduce three sight words at a time. Begin with the first sheet of Dolch pre-primer (preschool) sight words and choose three words. Show your child one flashcard at a time, saying the word clearly and asking your child to repeat the word after you. Put the first flashcard face down and repeat the process with the second and third flashcards.As you review each word, remind your child to try to remember what the word looks like. I would tell my kindergarten students to “tuck the word in their brain.” This phrase helped the children understand the concept of committing something to memory.
Info found at School Sparkshttp://www.schoolsparks.com/blog/sight-word-flashcards-and-tips-for-early-reading