TEST: 
----

 dir.ss 
 docs.ss
 draw.ss
 elevator.ss
 graphing.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
