This
sought
to
determine
the
effect
of
project
based
learning
(PBL)
professional
development
and
implementation
on
teachers’
perceived
ability
to
teach
and
assess
21st
century
skills.
At
the
end
of
the
2010-‐2011
school
year,
data
on
teaching
practices
and
perceptions
were
systematically
gathered
and
compared
from
two
groups
of
teachers
matched
by
demographics,
grade
and
subject:
teachers
expected
to
have
utilized
PBL
after
extended
professional
development
(44)
and
teachers
who
had
not
received
the
professional
development
or
were
not
expected
to
have
used
PBL
(42).
Teachers
who
used
PBL
and
received
extensive
professional
development
reported
more
teaching
and