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Figure 6(a). Instructor view before discussion. Many instructor objects are present including text boxes, lines drawn over the datapath, and values for control lines.

Figure 6(c). Projector view of modifications to support lw without displacement. Pen color changed to show which parts of the datapath had to be altered to accommodate the new instruction.

Wireless Data Projectors

While current implementations require a separate machine to drive the data projector (so as not to tether down the instructor), future versions may discard this requirement through the use of wirelessly enabled data projectors. While still in their infancy, wireless data projectors could set up a connection with the instructor tablet to project only the projector view version of a slide.

Figure 6(b). Instructor view after discussion. Datapath lines have been “inked over” in the order recommended in an instructor object text note. The class was asked to supply control line values, which could be “checked” against instructor note values.

5. Related Work There have been a number of technology in the classroom to capture the lecture for later (formerly Classroom 2000) [1]

related efforts to deploy enhance learning, and to playback. eClassroom is a premier project for

incorporating technology in the classroom to facilitate note taking, capture, playback, and presentation. While eClassroom includes some effort to improve presentation facilities for the instructor, our work focuses directly on this

aspect.

Classroom

Presenter

also

differs

from

eClassroom

in that our goal is enabled classroom,

to as

deploy in a general data projector- opposed to basing our design on a

dedicated

facility.

The

Pebbles system [10]

was one

of the

first projects to explore steering a

wireless devices.

Our

presentation

relates

to

emphasis on the broad

presentation from writing as part of literature on pen

computing and electronic whiteboards [11]. In this stage our work we are not attempting a semantic interpretation

of of

the

ink,

as

in

the

Back

of

the

Envelope

project

[6].

Work

on

zoomable

interfaces

has

relevance

to

our

work,

both

in

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