<s>
Presentation	B-Application
programs	I-Application
for	O
preparing	O
and	O
delivering	O
online	B-Application
video	I-Application
presentations	I-Application
have	O
a	O
place	O
in	O
educational	O
instruction	O
.	O
</s>
<s>
They	O
enable	O
presentation	O
of	O
teaching	O
materials	O
in	O
the	O
form	O
of	O
a	O
slide	O
show	O
or	O
as	O
a	O
screencast	B-Protocol
.	O
</s>
<s>
Among	O
such	O
packages	O
Microsoft	B-Application
PowerPoint	I-Application
is	O
the	O
most	O
widely	O
used	O
in	O
instructional	O
contexts	O
.	O
</s>
<s>
MS	B-Application
PowerPoint	I-Application
has	O
become	O
the	O
dominant	O
presentation	O
tool	O
because	O
it	O
is	O
both	O
readily	O
available	O
and	O
easy	O
for	O
instructors	O
to	O
use	O
(	O
Grabe	O
&	O
Grabe	O
2007	O
)	O
.	O
</s>
<s>
PowerPoint	B-Application
also	O
provides	O
graphical	O
,	O
transactional	O
,	O
aesthetic	O
and	O
interactive	O
features	O
.	O
</s>
<s>
PowerPoint	B-Application
is	O
for	O
use	O
in	O
the	O
classroom	O
,	O
and	O
needs	O
to	O
be	O
paired	O
with	O
use	O
of	O
an	O
LCD	B-Device
projector	I-Device
and	O
large	O
screen	O
.	O
</s>
