ImportError: No module named ***** in python

I am very new to python, about one month, and am trying to figure out how the importing works in python. I was told that I can import any 'module' that has Python code in it. So I am trying to import a module just to try it out, but I keep getting an 'ImportError: No module named redue'. This is an example of the python shell:

>>> import os
>>> os.chdir('C:\Users\Cube\Documents\Python')
>>> for file in os.listdir(os.getcwd()):
     print file
pronounce.py
pronounce.pyc
readwrite.py
rectangle.py
reduc.py

>>> import reduc

Traceback (most recent call last):
   File "<pyshell#32>", line 1, in <module>
    import reduc
ImportError: No module named reduc

What am I doing wrong? I am I overlooking something, or was I just wrongly informed?