This Bulletin Board Set covers the three types of microorganisms: bacteria, fungi, and protozoa. It contains 22 FULL PAGE, color posters with pictures to review the key ideas of the three types of microorganism. For each microorganism there is a definition poster, a characteristics poster, a benefits poster, a food poster, a disease poster, and other possible extensions as necessary. I have also included additional posters for shapes of bacteria, appendages of protists, animal like protists, and plant like protists to help students solidify and remember these ideas. A title is also included. All of the posters are color coded for the type of microorganism they correspond with.