What are the signs of shyness in a young student?

Shy students tend to show at least 3 or 4 of the following behaviors in preschool or primary school.  Shy students tend to:
1. Produce little or no voluntary speech
 2. Follow directions but don't respond verbally to them
 3. Turn away when spoken to
 4. Watch but don't join other students in fun activities
 5. Make little or no eye contact
 6. Speak softly
 7. Volunteer last and line up last for activities