Robotics toolkits and physical computing devices have been used in
educational settings for many decades. Based on a techno-historical
analysis of the development of 30 years of development of these
devices, this monograph examines their design principles and
presents a framework for the analysis and future design, based on
the analytic construct of "selective exposure," which examines what
is foregrounded or backgrounded in hardware and software design.
Selective exposure has two sub-dimensions: usability, which
examines how the material communicates rules for its use, and
power, which looks at how cognitive and physical operations are
mapped to each other, and how the design can make these connections
more explicit. This monograph shows how these dimensions crucially
impact what children can achieve with these materials, and make the
case for the design of toolkits in synchrony with the child's
developmental trajectory.
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