The major purpose of the study was to develop and carry out a mathematics extra-curriculum-"Daily Life Mathematics Summer Camp". A topic about mathematics used in daily life was taught in the morning. In the afternoon, there were game-like mathematics competitions held under the mode of STAD, one kind of cooperative learning teaching methods. The results showed that no matter which grader or gender the students are, the subjects had significant improvement on their mathematics self-efficacy. As a result, one-week intense Summer Camp improved the effect about junior high students' affectional performances. |