> Maths is big, and cumulative. The cumulative part needs to be emphasised. Almost every topic in math, from grade-school on up, has pre-requisite knowledge. I

> Maths is big, and cumulative. The cumulative part needs to be emphasised. Almost every topic in math, from grade-school on up, has pre-requisite knowledge. If you miss key knowledge you will easily get lost, so it's important to take things step by step.