The best list of sight words for 1st grade children would be the Dolch list. There are 220 words that show up frequently in written text and a certain number of these are introduced each year up until the third grade. These are words that the students need to learn by sight, not only by looking at the letters, but by the configuration of the word.
Here are the Dolch sight words for 1st grade children: after, again, an, any, ask, as, by, could, every, fly, from, give, going, had, has, her, him, his, how, just, know, let, live, may, of, old, once, open, over, put, round, some, stop, take, thank, them, then, think, walk, were, when
Created By Teachers.com has free cards of sight words for the students to take home. There are also word searches and sight boards for use in the classroom.
The School Bell.com has worksheets, puzzles, and games.
At Learning Books.net there are free flash cards, games, and lesson plans at this sight, as well as stories and other activities using the Dolch sight words.
Tools for Educators has games that can be printed out and used for teaching the sight words. It also has some worksheets that you may use.
Angel Fire has links to other sites which have a lot of resources for teachers. There are worksheets, games, puzzles, bingo games, and more. Some of the previously mentioned sites are also listed here, but there are more for you to inspect.
There are several sites online where students can practice the sight words for 1st grade children. A few are listed here:
Net Rover.com has Dolch Games and a game called Learn Sight Words by Categories. The types of games are Hangman, Listen and Spell, Listen Match, and Jigsaw. The Rain Game works on the spelling of sight words.
MRCPL.org has some really good Dolch sight word games. In every game, the word is pronounced when the mouse passes over it. The matching games are good for children’s concentration skills as well as learning the sight words. There are stories with the sight words highlighted. One really creative game is called Frig Magnet Poetry in which the player makes poems, sentences, and stories. This would be good for more advanced students. Some games have a sentence where a sight word has to be inserted.
There are many different kinds of games at Gamequarium. Star Words helps the player identify a word by its configuration, or shape. Make a Match is a Concentration-type game and Color Word Memory uses the color words. Missing Letters help with spelling the sight words and Spellbound displays a word for a short time, then the player has to type it. Finally, Gisele's Pick and Click has several different types of word games.
At Family Learning.org.uk there is a really cute game here called Dinosaur Eggs, where the player clicks on the egg that has the word that he hears. There are also Dolch Word Games and High Frequency Word Games where you either match the sound of the word to the written one, or drag the correct word to complete a sentence. Roy the Zebra is cute because you have to help the zebra get ready for bed by matching color words.