The data were collected during an eleven-period session of a computer
class. The time that the samples spent on studying was 12 periods. The experiment
took place at Huaiton Pittayakhom Computer lab on the second floor,
which contained 30 machines. The subjects were informed of the objects of the study. Each member of the samples did a pre-test before studying. After
finishing their studying, the samples did the post-test to check how much
they progressed. All data were analyzed and report.