For this game, have students stand together in a circle. The teacher will start the game by asking the first child to say "one." The child to his left will say "two," the next child "three," and so on. When the counting gets to a multiple of ten -- 10, 20, 30, etc. -- the child that says that number will sit down. The game continues until there is only one person left standing. It may take several rounds of counting to 100 depending on how many children are in the class.
Use the basics of the traditional game "Mother, May I?" to give your students practice in counting to 100. This game should be played in a large outdoor area or gym. Line students up behind a rope or other starting line. The teacher will be standing facing them, but farther down the field or gym. The teacher will call to the children "take ten baby steps" and the children must ask "Teacher, may I?" The teacher says yes and the students must all count to ten as they take baby steps. On the next round the teacher will call to the students, instructing them to use a different step, such as hops, backward steps, etc., and the students will count from 11 to 20 while taking those steps. Each round will be the same with the students counting the next multiple of ten until they make it to 100. The teacher will need to count with the children to keep them on track.
For this game, prepare 100 index cards numbered one to 100. Have the children place their heads down on their desks, eyes closed and hands held behind their back. Walk around the room and put the the cards labeled one through ten in the hands of random children around the room. When you are done, have the children look up. Those with the cards in their hands line up in order in the front of the room. Once they have lined up in order, they give their cards back to the teacher and they become the passers. They pass out the next ten cards and the process begins again with the new children becoming the passers. Play continues until all one hundred cards have been used.
There is a vast selection of online games that cover the topic of counting to one hundred. These can be used in a computer lab setting, in a classroom with groups of children, as a time filler for those children who finish their work early, or at home for extra practice. ABCya!.com (see Resources) has a 100 snowball game where children can make a winter scene using 100 snowballs. Websites such as PBS Kids (see Resources) have counting games that use children's favorite cartoon characters to help them learn to count.