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.
If you become a preschool teacher, you'll educate children primarily through stimulus and play, using props, games, stories, art and music. You'll work with students on social skills and vocabulary development as well as introduce basic concepts in math, science and physical education.