Agar plate storage in the fridge: Is it necessary to store the agar plates upside down in the fridge? As in the school we are attending to so many things that we are sometimes in a hurry to check

Agar plate storage in the fridge: Is it necessary to store the agar plates upside down in the fridge? As in the school we are attending to so many things that we are sometimes in a hurry to check
Agar plates: I've been asked to make up agar plates with different pH values from 3–11—any information I can find on the net suggests the agar won't set at a low pH. Any ideas?
Inoculating agar plates and sealing them: Could you advise the correct procedure for innoculating agar plates, and in particular, sealing them?
Agar plate experiments: Can E. coli and/or Staph epidermidis be cultured from a broth onto an agar plate in a classroom situation.
Disposal of Agar plates: After reading your procedure on making agar plates, I found that the procedure was unable to give me any specific information on the disposal of used plates with live cultu