Abstract: After computational thinking was put forward,many countries and regions began to explore computational thinking instruction one after another.For the past years some valuable evaluation schemes for the separate computational thinking instrucion at the k-12 level were formed.But in higher education,most of the computational thinking instructions are infused instruction.As for the evaluation of this instructon,the mature evaluation tools or schemes are only a few.The research finds that some existing computational thinking assessment tools are not suitable for the infused thinking instruction of higher education.People need to seek more practical quantitative method associated to the assessment of the curriculum knowledge.Only by comparing the computational thinking level of learners before and after receiving education,can the effect of computational thinking education be evaluated.The paper is based on the viewpoint that computational thinking is a disciplined thinking,and its development needs to experience the four levels-knowlegement points,instrumentalism,methodology,and stratage-from low to high.This paper proposes a computational thinking assessment scheme and gives a quantitative formula for computational thinking level and migration rate.It regards them as the important basis of the computational thinking teaching reform.In the teaching practice of computational thinking based on courses in a university,it proves that education activities have achieved positive results through comparing the two groups of students.

Key words: computational thinking, test, infused computational thinking instruction, computational thinking level, migration rate