A biofilm is any group of microorganisms in which cells stick to each other and often also to a surface. These adherent cells become embedded within a slimy extracellular matrix that is composed of extracellular polymeric substances (EPS).
Career Requirements. Kindergarten teachers in public schools are required to have at least a bachelor's degree in education and teacher certification for the state in which they work. Certification typically requires candidates to complete student teaching requirements and pass any required professional exams.
Bachelor's Degree. All 50 states and the District of Columbia require elementary school teachers in public schools to hold at least a bachelor's degree in elementary education, according to the Bureau of Labor Statistics. Some states require elementary school teachers to major in a content area such as science or math.