Which role does the teacher play in the following activities? When the

Which role does the teacher play in the following activities? When the students are doing a group work task, the teacher joins one or two groups for a short period of time.

source of help

controller

participant

assessor

答案及解析：本题考查教师的角色。根据题干中的关键词“join in”,教师加入小组活动中，真正成为小组活动的一员与小组成员互动，可知正确答案为“participant”，综上，C选项正确。A选项，资源的帮助者，不合题意，故排除。B选项，控制者，不合题意，故排除。D选项，评价者，不合题意，故排除。故正确选项为C。