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.
Kindergarten and elementary school teachers generally teach kindergarten through fifth grade. However, in some schools, elementary school teachers may teach sixth, seventh, and eighth grade. Kindergarten and elementary school students spend most of their day in one classroom.