ABSTRACT
This study aimed: 1) to develop a lesson on the T5 Model Networks, whose efficiency by the E1/E2 formula
was set at 85/85 criterion and also to find its effectiveness index, 2) to compare students’ learning achievements
gained before and after learning, 3) to compare students’ achievements in learning through the lesson on
networks versus the traditional approach. A sample was 50 second year students of vocational certificate level at
Namphong Technological College selected by cluster random sampling. The treatment group of 25 students was
managed by the T5 Model Networks lesson, while the control group by traditional learning. The instruments used
in the study were a lesson on the T5 Model Networks, a learning organization plan, a learning achievement test
whose difficulty values ranged from 0.60 to 0.76, discrimination power values from 0.25 to 0.50 and reliability
value was 0.79, and a test whose difficulty values ranged from 0.60 to 0.80, discrimination power values from 0.25
to 0.58 and reliability value was 0.79. Statistics used to analyze data were mean, standard deviation, Hotelling
T2 for hypothesis testing.
The findings showed: 1) that the T5 Model Networks lesson had efficiency of 82.56/88.80; 2) that the
effectiveness index value was 82.50 percent; 3) that the students of treatment group had a significantly higher
learning achievement than those of control group who were taught by traditional approach at the .01 level of
confidence, and 4) that the students had learning achievement after learning higher than that before learning at
the .01 level of significance.
Keywords : Learning Achievement / Professional Competency / Lesson on Networks / T5 Model.
รัชฎาภรณ์ ขนานแข็ง สุทธิพงศ์ หกสุวรรณ และ อัชชา เขตบำรุง