Exercises are built inside the workbook source of a workbook. Each normal exercise consists of four separate sheets: Meta, Sample, Solution and SCT. Click on the links for detailed information on each of these sheets.
The exercise sheets must follow a strict naming convention, which is case sensitive and space sensitive:
Exercise <exercise_number> - <Meta|Sample|Solution|SCT>
As an example, here is a workbook source that has two exercises:
Each individual exercise has four sheets and the Golden Copy is an extra sheet that applies to both exercises, since they are in the same workbook.