Small Group Activity
Building a single bumper : Have students work
in small groups, following Constructopedia bumper building instructions, pages
26-29. Give each student a copy of the
As they build, talk to students in their groups, showing them the touch sensor
hidden in the bumper. When they have finished building, encourage them to press
on the bumper lightly and observe the state of the sensor on the RCX display
window. It might be helpful to connect the short connector wire from the bumper
to port 1 and to check the state of the sensor when the bumper is pushed.
Have the students follow the activity sheet
giving them enough time to work on solving the above problem (which is also the
first RCXtra problem in their activity sheet). If you notice that some students
experience difficulties, suggest breaking the problem into smaller chunks. For
example, suggest programming it to reverse direction as it hits something,
download and test it that far. Once they solve this part, they can add the next
step of turning in place.
The following Programming Highlights section is
somewhat different from the same section in previous activities. Instead of
introducing new command blocks, the focus here is on several possible solutions
to the problem, pointing out important issues in studentsí programming attempts.