Most preschoolers enjoy music, and they may be able to more easily memorize information when it's set to music. Teach them the Spanish words to songs they already know such as "Mary Had a Little Lamb." If you can't pronounce Spanish, find a CD of children's song in Spanish from the library. Once children have heard the songs enough to sing along, go through the songs slowly. Have children say the lines in Spanish, then see if they can guess what the word means in English.
Make two sets of picture cards with images of animals and household objects to teach children vocabulary. In each pair of cards, write the item's name in English on one card and the Spanish name on the other. Place cards face down on the table. One at a time, each child turns over two cards. Each time he turns over a Spanish card, say the word out loud and ask everyone to repeat it. Children should start to be able to repeat the Spanish words themselves eventually. When a child finds a pair, he gets to keep the pair. This game teaches children to recognize the vocabulary words in English as well as Spanish.
Children learn through repetition, so teach them phrases that you can use several times a day. Every morning, greet students by saying "Buenos Dias!" or "Hola!" Before meals, say "Tengo hambre," which means "I'm hungry." When children leave, say "Adios" or "Hasta luego," which means "see you later." Research the Spanish words for items you commonly use in your classroom. Children will mimic what you say to them and will learn to pronounce these common phrases from listening to you.
Teach children how to count in Spanish by counting off on your fingers. Once children are familiar with the words, use them throughout the course of the day. When you're dividing children into groups, count them off in Spanish. Before starting a craft project, ask each child to choose "ocho" crayons or "quatro" pieces of paper. Once everyone is able to count to ten, teach them 11 through 20. When you walk down the hall, have the class count their steps out loud.