I'm creating a lesson plan for people learning at their own pace.   I
was told to start off with a simple application that can be added to
in many ways.    I'd like to avoid JavaScript, and would love it if
they ended up using XML.   Everybody has or will have JBuilder and
Resin.

What I think I will do is set up a Sudoko screen, but I'm not sure
what the best steps (and order) are - nor the best way to add Java,
and would like feedback.

1.   Create a hard web pages with hard coded numbers, and unprotected
cells.
2.   Change this to read in a table, with protected and unprotected
cells.
3.   Add logic to read the screen and check the answers.   (ignore
multiple values in a cell)
4.   With step 3, we can turn this into a pseudo-conversational quiz,
allowing the back-button to go back.
5.  Add style sheet(s).
6.  Modify logic for different size and shaped cells.
7.  Make this a client-server application.
8.  Add helper logic, generator logic, or solver logic as optional.

I will be doing much of the learning, trying to say ahead of students.