Strategy and Practice on Continuous Improvement of Achievement Portfolio Based on Causality

As an advanced teaching and evaluation method, the achievement portfolio is widely popular in university teaching and learning reform, but there is still the problem of unsatisfactory teaching effect. How to carry out scientific and effective continuous improvement of the achievement portfolio based on the evaluation results and further improve the teaching quality of universities has become a hot topic nowadays. This paper deeply integrates the concept of Outcome-Based Education (OBE) and causality, firstly constructing a causal model to clarify the inner connection between teaching variables. Secondly, a stratified analysis of the confounding factor which is the learning-specific variable is conducted, and the back-door adjustment formula is introduced to calculate the causal effect of teaching methods on learning outcomes. Then, the improvement measures of multi-dimensional topics, multi-channel display, and multi-level assessment are proposed, and the reasons for improvement are analyzed through the causal diagram. Finally, the implementation is carried out in teaching, and it is found that students' overall classroom engagement and academic performance increased significantly, and the causal effect of teaching methods on learning outcomes is greatly enhanced, indicating that the improvement methods and measures are scientific and effective.