This activity is
designed to give students opportunities to use the touch sensor in a variety
of problem settings. As students write programs, it is important to help
them think beyond the effects of single blocks. Transparency # 4 is designed
to facilitate an understanding of how information flows in a program.
In the first part, you
will discuss with students the advantages of adding a touch sensor to a
robot. Then you will have students build a bumper and attach it to Roverbot
so they can set it free to move through the environment autonomously.
Students will then
follow the activity sheet and solve selected problems from the RCXtra
section. Throughout the process, you will help students understand that
programs rarely work the first time, and that reworking the solution (or
debugging a program) is as important a part of the work as writing the
program in the first place.
You may also offer
students the challenge of solving the “Table Bumper” problem. This involves
adding an arm-like bumper with a touch sensor in each arm to Roverbot and
programming it so that it can move on a table without falling off the edge.
The table bumper can provide a nice transition to a similar problem in the
Lighten Up! activity, using a light sensor