本段影片教學主要是說明moodle權限別總共有哪些角色可以使用，而之後將會說明這幾種身分別在課程單元進行中有那些差異的地方，一開始先概述讓大家知道有這些身分別及權限，而因為有些我還沒有深入了解其權限差異，將在之後進行的過程中補強此部分

而以下文章是英文版的moodle官網上對於各個角色的說明，列出這些資訊是預先作為我之後錄製英文版教學的時候會用到
Site administrator - can "do everything" on the site
Manager - a lesser administrator role
Course creator - can create courses
Teacher - can manage and add content to courses
Non-editing teacher can grade in courses but not edit them
Student - can access and participate in courses
Guest - can view courses but not participate
Authenticated user - the role all logged in users have
Authenticated user on the front page role - a logged in user role for the front page only