TEST: 
----

* arrow.ss
* arrow-gui.ss
* convert.ss
* dir.ss 
* docs.ss
* draw.ss
* elevator.ss
* graphing.ss
* guess.ss
* guess2.ss
* guess3.ss
* gui.ss
* lkup-gui.ss
* hangman.ss : changed, docs
* master.ss : changed, docs
* pingp.ss 
* - pingp-test-play.ss : play with a ping-pong
* - pingp-test-trace.ss : test the two tracer interfaces
* protect.ss
* pingp-play.ss 
* protect-play.ss 
 - both are tested with pingp-play-test.ss
 rectangle.ss

Mon Oct 18 16:56:38 CDT 1999: re-organization into teachpacks