在英语作为第二语言教学行业中,大多数人,无论作为视导员,作为被视导的教师,还是作为局外的观察员,很可能这一次或那一次经历过视导工作。如果我们把这些经历思考一番,试图描述视导员在其中所起的作用或承担的职能,那末,这些作用或职能,大概可分成如下类型之一种或数种: In the teaching of English as a Second Language, most people are likely to experience the job once or for all, whether as a video guide, as a Visiting Teacher or as an outside observer. If we think of these experiences in an attempt to describe the roles or functions assumed by the facilitator, the roles or functions may be roughly divided into one or more of the following types: