[header] How to be a preschool teacher [title] Obtain a high school diploma. [step] The minimum requirements to be a preschool teacher are to have a high school diploma and a certificate in early childhood education. If you do not have a high school diploma, you can obtain a high school equivalency credential by taking the ged exam. 
[substeps] Sign up for test-prep classes through your local community college or technical college to prepare you for the ged exam. The ged testing service also offers low-cost and free practice tests and tutorials online.