چکیده (انگلیسی):

This experimental study aims to investigate the effects of using collaborative learning to enhance
students‟ speaking achievement. The study using a pre-test and post-test design was conducted
with 35 undergraduate students enrolled in a fundamental English course at Bangkok University
to examine their speaking achievement on an English oral test before and after they had
participated in provided instructional tasks based on collaborative learning. To explore the
students‟ views on the use of the collaborative learning, all of the stu dents were asked to complete
a student diary after finishing each task, fill in a four scale-rating questionnaire and join a semistructured interview at the end of the course. The data was analyzed by frequency, means,
standard deviation, t-test, effect size (Hedge‟s g) and content analysis. The findings reveal the
improvement of the students‟ speaking performance and positive feedback from the students on the
use of collaborative learning activities. The study provides some pedagogical implications and
suggestions for further investigations.