Where I can find complete information about these Windows XP
Utilities:  Dr. Watson, Resource Meter, System File Checker, ScanDisk,
and Registry Checker that are non-technical and written for students
who are beginners in Computer Science?

I am not sure where you could find a resource as such. But if you have
questions about these go ahead and post them. I amoung many others
could proboly help you.

Start with these:

Dr. Watson calls
http://www.pcanswers.co.uk/tutorials/default.asp?pagetypeid=2&articleid=29560&subsectionid=607

The Windows Resource Meter
http://www.russelltexas.com/tutorials/resourcemeter.htm
..."The Resource Meter is not available for Windows XP or Windows 2000
because those NT operating systems handle resources much more
efficiently..."

System File Checker
http://www.bleepingcomputer.com/forums/tutorial58.html

What is the System File Checker (SFC) command on a Windows 2000/XP/2003 computer?
http://www.petri.co.il/what's_system_file_checker.htm

Windows XP "SCANDISK"
http://www.duxcw.com/faq/win/xp/scandisk.htm

Step-By-Step: Care and Feeding of the Windows Registry
http://www.pcworld.com/howto/article/0,aid,86903,00.asp
Using the Registry Checker should only be taught in the bigger picture
of what the Registry is.