Teacher is a short, simple hack.  I won't spoil the fun by telling you what
it does.  

 PERMSSN    UID  GID    PACKED    SIZE  RATIO     CRC       STAMP          NAME
---------- ----------- ------- ------- ------ ---------- ------------ -------------
[generic]                  299     974  30.7% -lh5- b63d Apr 30  1989 Teacher.info
[generic]                   47      47 100.0% -lh0- bf6b Apr 30  1989 Teacher/.info
[generic]                   57      93  61.3% -lh5- a5d7 Apr 30  1989 Teacher/makefile
[generic]                  126     154  81.8% -lh5- 21ca Apr 30  1989 Teacher/README.fnf
[generic]                  459    1866  24.6% -lh5- eba0 Apr 30  1989 Teacher/README.fnf.info
[generic]                 4387    7976  55.0% -lh5- 8507 Apr 30  1989 Teacher/Teacher
[generic]                 1311    3169  41.4% -lh5- 0914 Apr 30  1989 Teacher/Teacher.c
[generic]                  270     474  57.0% -lh5- 7a0e Apr 30  1989 Teacher/Teacher.doc
[generic]                  459    1866  24.6% -lh5- 5312 Apr 30  1989 Teacher/Teacher.doc.info
[generic]                  417     674  61.9% -lh5- 4d40 Apr 30  1989 Teacher/Teacher.info
---------- ----------- ------- ------- ------ ---------- ------------ -------------
 Total        10 files    7832   17293  45.3%            Apr 30  1989