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.
Preschool Teacher. Preschool teachers teach children ages 3 to 5 about the basics of subjects like reading, writing, math, and science. For many students, this is their first structured learning experience, so preschool teachers often show their students an elevated level of care and attention.