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Abstract. The aim of this research is to produce mathematics instructional package based on problem in senior high school students oriented to student-s critical thinking skills and curiosity based on aspects of validity, practicality, and effectiveness. This study was research and development with used ADDIE-s model (Analyze, Design, Develop, Implement, and Evaluate). The research subjects were 10th grade students of MAN 4 Kampar. The research instruments were validation sheets, teacher assessment sheets, student assessment sheets, learning implementation observation sheets, critical thinking skills test, and curiosity questionnaires. The instructional packages were valid if the experts judgment were categorized minimum as valid. Then the instructional packages were practical if the teachers assessment and students assessment were categorized minimum as practical. Furthermore, the instructional packages were effective if the percentage of students who completed in the test of critical thinking skills reaches at least 70% and if the percentage of the results of the students curiosity questionnaire reaches at least 75%. The results of this research show that mathematics instructional package was very valid. Then based on the results of learning implementation show that mathematics instructional package was very practical. Furthermore, the mathematics instructional package was effective based on the results of evaluation of critical thinking skills and student curiosity questionnaires.