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.
Elementary school teachers instruct students in multiple subjects, such as reading, writing, English, science, math and social studies. These educators generally teach kindergarten through fifth grade. In some schools, however, they may teach other grade levels, such as pre-kindergarten and sixth grade.