Hello, I have a single subject credential (K-12) and want to work as a substitute teacher. I had taught in a high school setting and subbed for teachers at my school. I have not worked with lower grades that I can remember. I took time off and now getting back into teaching and want to try substitute teaching for the flexible schedule. I have applied to one district and one substitute agency for substitute positions. For those who have worked as substitute teachers, specifically in state of CA (as rules may be different in other states). The sub agency lists schools with subs for pre-school, kindergarden, elementary, middle and paraeducators AND subject areas that I am not credentialed for. Questions: 1. Can I take substitute jobs for subject areas that I am not credentialed for? 2. What does a para-educator do? 3. How is it (hard or easy) to substitute for a kindergarden middle, and elementary class? 4. How is it (hard or easy) to sub for a class in a subject that you do not know? Thank you for your time and help.