The Church of Scotland website contains helpful documents regarding the role of elders and specific positions, such as Session Clerk. Following are links to each of these.
WHO ME?: is intended to give a brief explanation of the tasks of Eldership for new and prospective elders.
Rediscovering the Eldership: reflects briefly on the biblical and historical background of the Eldership, from biblical times to the present day.
Elders Moderating Kirk Session Meetings: See an example of a recent training session.
The Office of the Session Clerk
Congregational office bearers' guidance notes