SO
MANY
of
my
students
were
incredibly
smart
.
I
knew
they
would
get
into
the
working
world
and
create
terrific
new
software
programs
,
____________________
projects
and
entertainment
devices
.
I
also
knew
they
had
the
potential
to
frustrate
____________________
of
people
in
the
process
.
Those
of
us
who
are
engineers
and
computer
____________________
don't
always
think
about
how
to
build
things
so
they're
easy
to
use
.
A
lot
of
us
are
terrible
at
explaining
complex
tasks
in
simple
ways
.
Ever
read
the
instruction
____________________
for
a
VCR
?
?
That's
why
I
wanted
to
impress
upon
my
students
the
importance
of
thinking
about
the
end
users
of
their
creations
.
How
could
I
make
clear
to
them
how
important
it
was
not
to
create
____________________
that
is
frustrating
?
?
When
I
taught
a
?
user
interface
?
class
at
the
____________________
of
Virginia
,
I'd
bring
in
a
working
VCR
on
the
first
day
.
I
would
put
it
on
a
desk
in
the
front
of
the
room
.
I
would
pull
out
a
sledgehammer
.
I
would
____________________
the
.
?
The
students
would
look
at
me
and
I
could
tell
they
were
shocked
,
____________________
and
slightly
amused
.
It
was
exciting
for
them
.
They
were
thinking
:
?
I
don't
know
who
this
guy
is
,
but
I'm
____________________
coming
to
class
tomorrow
to
check
out
his
next
stunt
.
?
I
sure
got
their
attention
.
That's
always
the
first
step
to
solving
an
____________________
problem
.
?
All
of
the
students
from
my
days
at
UVa
.
____________________
____________________
the
____________________
now
.
As
they
go
about
creating
new
technologies
,
?