Here are the core words I am required to teach in my county. I use these on my word wall. They come in black and there is a set that has the vowels in red. Words included: a. and. are. at. be. can. cat. come. dad. dog. go. he. here. his. I. in. is. it. like. little. look. me. mom. my. no. of. on. one. play. red. said. see. she. so. the. to. up. we.
I have some mini books that teach the first 12 core words, too. I use these for homework and fluency practice.