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The purposes of this research were 1) to develop of lesson WBO of Create a Web Page with HTML the Diploma in Web Development by HTML to be quality and efficiency. 2) To compare pretest and posttest achievement scores of lesson WBO of Create a Web Page with HTML. The samples group involved in this research were the second year certificate students of Information Technology Department at Udonthani Technical College. They studying Web Development by HTML in second semester of the 2016 academic years, which include 40 students that select by sample random and divided in to 2 group of 20 persons. The instruments of research were WBO “Create a Web Page with HTML” and an achievement test comprised multiple choices with the index of congruence between 0.50 to 1.00. The difficulty between 0.23 to 0.80. The discrimination between 0.20 to 0.67 and the reliability coefficient of 0.85 the data was analyzed by mean, standard deviation and t – test Dependent Sample. The results of research shown that : The quality of WBO in Web Development by HTML “Create a Web Page With HTML” for the second certificate student was very good ( = 4.90 ) that include quality’s Content was very good (= 4.92 ) and quality’s technical media was very good ( = 4.89 ). The efficiency Create a Web Page with HTML E1/E2 = 91.87 / 88.07 and learning achievement after the lesson WBO create a Web Page with HTML was statistic substantial higher than this before the lesson at .05.
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