If you have multiple students on one computer, then each student
will need his/her own Windows login on that computer, so that
Office 2003 can save each student's speech profile under his/her
login. For more information, see:

http://support.microsoft.com/?kbid=306537
How to install and configure speech recognition in Windows XP

http://support.microsoft.com/?kbid=826851
How to install and configure speech and handwriting recognition
in Word 2003

http://support.microsoft.com/?kbid=826853
Frequently asked questions about the speech recognition feature
for Office

K Loftis wrote:

I am a teacher who is trying to use Microsoft Office 2003 speech recognition.
Can multiple students use Word or any other Office program with seperate
speech profiles? How can you set up a new training session for different
students?