Small children are just learning about themselves and their surroundings. Creating a theme based on the students can capture students' attention. You can focus on body parts, learning to spell names and members of the family as part of this unit.
Children are often fascinated by the world around them and people that are different. Use a map to show students the different countries of the world and do hands-on activities to learn about different cultures. For example, you could taste Mexican food, learn an Irish dance or do some simple Japanese origami.
Gardening gives students a change to get their hands dirty, learn science and understand where food comes from. Read books about planning a garden, and learn the colors by looking at flowers. Plant tomato plants in your classroom, and let the students eat the fruit of their hard work.
Children can learn about how their body works and the many ways that they can learn about the world. Focus on a different sense each week, and plan activities that use these senses. For example, you could do finger painting during the "touch" week, taste different foods during the "taste" week and try to identify sounds during the "sound" week.
Active kids may enjoy learning about sports. This preschool theme will help students develop their large motor skills. Teach about the different sports, learn some rules of the game, and then head outside so that students can try their hand---or foot---at playing the game.
Water is essential for life, and students may enjoy learning about it. Incorporate water into your activities. You can show students how to use watercolor paints or how to water plants correctly. A water table allows students to play in the water, pouring it and splashing in it. Prepare to get wet during this unit.