HELP PLEASE...Rhyme scheme

[TeachG141@aol.com]

Hi all,
I'm trying to teach rhyme scheme to my seventh graders.  Another  English 
teacher and I differ on how to label a rhyme scheme. Now I'm totally  confused 
and I don't know which way is correct.  Would you start again  with A on each 
stanza or do you continue through the alpahabet for the entire  poem?  Can 
anyone PLEASE tell me what the correct rhyme scheme is for  the following poem? 
It's driving me crazy! Thanks in advance!
 
 
Answering Machine Messasage
Hello, you've reached the  Bloom house, 
But we can’t take your  call,                               
We’re either very busy,                                           
Or we’re not home at  all.                                          
We’re probably out  shopping,                                         
Or maybe on a trip -----                                        
A flying visit to Peru;                                                       
      
Perhaps we’ve taken ship                                         
To some exotic port of  call,                               
Like Fiji, London, Rome,                                                   
Or Hackensack, New  Jersey.                                                   
That’s why there’s no one  home.                               
We could be in the south of  France,                     
Relaxing in the sun,                                                   
Or climbing up Mount Everest  -----                               
I hear that’s sort of  fun.                                                   
Or maybe in Australia,                                                   
Helping shepherds tend their  sheep.                               
But we’ll be calling back,   
So leave your number at the  beep.