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.
How old does a child need to be to start kindergarten? A total of 32 states in the United States require that a child be 5 years old on or before September 1 in the year he or she starts kindergarten, with 11 states having a cutoff date between September 1 and October 15.