Tokens: It
seems
to
us
that
in
such
an
interaction
the
teacher
may
have
an
expectation
of
privacy
,
in
the
sense
that
he
or
she
may
normally
expect
that
what
is
going
on
in
the
classroom
can
be
followed
only
by
those
who
are
entitled
to
attend
the
class
and
who
actually
attend
it
.
No
“
unwanted
attention
”
from
others
,
who
have
nothing
to
do
with
the
class
.
There
may
be
exceptions
,
for
instance
when
a
lecture
is
taped
for
educational
purposes
,
including
for
use
by
students
who
were
unable
to
physically
attend
the
class
.
However
,
in
the
applicants
’
case
there
was
no
such
purpose
.
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