Research on Formative Evaluation of College English Teaching Based on Online Learning Platform

In order to integrate information technology and teaching reasonably and improve teaching quality, this paper puts forward a formative evaluation study of college English teaching based on online learning platform. Take U campus as an example. The U campus is called the U campus intelligent teaching cloud platform, which is a one-stop online English teaching and learning platform integrating teaching, learning, evaluation, testing and research. Based on data design, the platform uses data science and machine learning technology to establish a typical learning model, and helps teachers and students realize personalized, intelligent, dynamic, autonomous and mobile teaching and learning through real-time data analysis and processing of teaching activities and contents in the background. This paper expounds that formative evaluation driven by big data should follow the principles of data, diversification, motivation and development, and establishes the evaluation index of qualitative evaluation in formative evaluation of college English based on online learning platform through expert evaluation. At the same time, this paper also provides students with learning effect information, puts forward personalized opinions and suggestions, makes scientific and reasonable predictions for students' future development, gives personalized development planning paths, helps students' progress and growth, and stimulates students' innovation vitality.