The purpose of this study is to discribe critikal thinking and problem solving achievement of female students using constructivism mathematics instructions. The subjects of this study are 81 students of seventh grade at one of private junior high school in Malang. The instruction model is based on the constructivism. This model consists of a book lesson plan mathematics worksheet tests for critical thinking and problem solving achievement. The instruments are scoring rubrics and an observation guide for the instruction. This study concludes that both of the critical thinking and problem solving achievement of the girl are fair.