In addition to the exercises there are reminders in the workbook. These are short recapitulations of the lessons in the manual for the pupils.
There are 13 reminders.
On the remaining 42 pages there are always 12 positions a page. That means a total number of 42x12-18 (the drawings) = 486 positions.
The issues of the exercises are the same as in the manual.
See Manual for chess trainers.