This reseach was aimed to develop learning kit of vector with Creative Problem Solving approach in grade XI -SMK Teknokestan, covering lesson plan and worksheet which is valid, practical, and effective, –and learning achievement test which is valid and practical. The research is research & development, which was carried out by the implementation of 4D development model, which consist of four stages: define, design, development, and dissemination. The product validity can be seen from the result of expert validation who claimed that the criteria of product was very valid. The product practicality can be seen from the result of the teacher practicality sheets which show that the product criteria was very good; the result of the student practicality sheets show that the product criteria was good; the learning implementation observation sheets show that the minimum implementation percentage was 83.3% and maximum was 86.1%. The effective product can be seen from the result of learning achievement test reach KKM more than 70%.