Definition. The prefix (-erythr or -erythro) means red or reddish. It is derived from the Greek word eruthros meaning red. Examples. Erythralgia (erythr-algia) - disorder of the skin characterized by pain and redness of affected tissues. Erythremia (Erythr-emia) - abnormal increase in red blood cell numbers in the blood.
Jokes that go too far. All can threaten the secure learning environment that teachers strive to create. Whether it's alleviating the first-time-in-school fears of a kindergartner or ensuring a safe haven for a teased teenager, making a classroom safe is the first step to effective learning.
Setting a Positive Example. 1  1. Always be positive. The most important tool in creating a positive classroom atmosphere is for the teacher to be a positive role model. 2  2. Model good social skills. Your students will mimic the behavior that you display. 3  3. Use strong role models. Integrate role models from the community into your classroom.