Start when the pattern appears, not only when marks collapse.
Some parents wait until the first poor Add Maths result before looking for help. That is understandable, but it can make the repair harder because the student may already feel defeated. A better trigger is the pattern: algebra is slowing down, the student can follow examples but cannot start changed questions, or functions and equations are beginning to feel disconnected.
For Cambridge Additional Mathematics 0606, readiness matters. The student needs enough algebra control to rearrange, factorise, substitute, interpret notation, and keep multi-step working organized. Tuition works best when it names the exact weak step and gives the student a repeatable method before the syllabus becomes too dense.

