All of these are valid ways to school. For my own family carschooling is very popular. It is common to find a history cd or math facts cd in our cd player in the car or even both (we have a 5 disk player.)
Printed worksheets from time4learning.com on a clipboard is always a possible find too.
You will usually find books of all kinds in our van.
I even ran into a mom at the dentist who was doing school in the waiting room with her other children while one was there for a check up. It should be just called Schooling! Cause we are very seldom do it only at home.
Do you do vacationschooling, carschooling or roadschooling?
Be sure to join me over at Dawn's "The Momma Knows" blog to see what "H" is for other Homeschool Mom's.