Should I keep a
webpage or blog while I am overseas?
Would that
be a good way to keep in touch?

Why
not!
A
webpage or a blog is a good way to communicate with
family, friends, and old coworkers about where you are
and what you are doing. It's also a good way to let
people know that teaching English overseas is a serious
business, that you are working hard, and that it is not
all fun and games (an important message for your past
supervisors and coworkers especially!).
Work and Play
While the temptation might be to show off the travel and
play segments of your life overseas, it might also be
useful to also communicate about the cultural knowledge,
languages, and other skills you will be acquiring.
Documenting your Life Overseas
One
great thing about a website or blog will be the record
you have made - to review later in life. A nice
documentary of times overseas if you go back home to
live. And a nice step in your development if you remain
overseas.
Pre-Internet Days
My
mother saved all my letters from my Peace Corps days and
gave them back to me after my time in Africa was
finished. It was a great gift as I had kept no other
documentation of my two years there. It was also good
proof to me of my good efforts to increase communication
with my parents when overseas.
Do
it!
You'll be happy that you documented your time.
