To proceed with the third step the knowledge from step two is indispensable, but apart from that step three is not really difficult.
The tactics issues are relatively easy and also the lessons about defending against tactics should not cause any problems. Only trapping is a bit tricky. It can be compared to mating but now instead of the king another piece is the victim.
Furthermore, attention is being paid to the first pawn endgames. For some students it is a child's play but for those who have still problems with the control of space it is a tough struggle.
In this step we begin to teach the supporting skills. One of them is 'thinking ahead'. The student calculates in his head the possibilities and visualizes ( tries to imagine) the new situation which arises on the chess board. The command of this skill can differ enormously per student