Abstract: College English development courses have been opened in colleges and universities all over the country, but problems still exist: single teaching methods, hard to meet the needs of students in the content and form of teaching materials.The design of three-dimensional teaching materials provides solutions to these problems. Three-dimensional teaching material is a new form of teaching material in the educational information environment. Through the introduction of the concept of three-dimensional teaching material and the analysis of the existing problems of the college development courses, this paper puts forward the design scheme of three-dimensional teaching material, and expounds in detail its concrete content and its dynamic, interactive, extended and interdisciplinary characteristics from three angles: the content, the form and the interactive way of the material.

Key words: College English, Expanding courses, Three-dimensional teaching material