The purpose of this study is to specify the effects of cognitive flexibility and self-regulation skills on students’ achievements in web mediated problem based programming language learning towards gender and class groups. Self-regulation skills towards web based programming language education is discussed under three dimensions; learning skills, learning strategies and self-efficacy. Level of cognitive flexibility is reviewed by comparison of time and percentage of success. Causal-comparative research model is used in this study where five different class groups are compared in. Furthermore, a web based problem was given to this students and their success is calculates as the grades that they get from each step. As a result, this paper indicates that when the correlation between level of cognitive flexibility and students’ achievements is taken under consideration it is seen that there is a positive linear relationship between them. It can be said that students who have higher cognitive flexibility level also have advanced problem solving skills. Keywords:  web-based learning; problem-based learning; cognitive intelligence,  self-regulation

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