Brainstorm various subject areas that your preschoolers may benefit from learning more about. These can be simple school subjects, such as the alphabet or shapes, or fundamental principles for life, such as eating five servings of fruits and vegetables each day, which is a recommended lesson plan for preschool by the North Carolina Division of Public Health.
Consider the interest level of preschool children as you work to extend the curriculum. For example, you might think a lecture on the nutrients in fruits and vegetables is important, but that doesn't mean 3- and 4-year-old kids will. Keep their interest and attention spans in mind as you plan.
Create a lesson plan that involves activities and hands-on learning for the preschoolers. This will help ensure that they learn and have fun, which is essential for students this age. For example, sampling fruits and vegetables can be incorporated into the healthy eating lesson, and interesting objects can be used to help the students learn new shapes.
Make a plan. A basis for the curriculum as well as activities are important, but also write a detailed lesson plan that goes through each step of the process, including what you need to explain, pass out or ask questions about, and when you will do each step.
Be prepared to change the plan. A plan is important, but with young children, you must be flexible. When expanding your curriculum, you're bound to make mistakes, such as planning an activity that goes on too long or that the children are not interested in. When things don't work, move on or use that extra time for some free play or an art lesson, both of which the preschoolers can always benefit from.