My DS is in P5 GEP this year. Based on my observation for maths, usually they will have worksheet with 5-6 questions for one topic. The level of difficulty go higher as you work down the numbers. I am quite hand off until DS need some help, and me also need to spend between 15-30 minutes to understand and if I know how to do it, still have to bring it to their level of understanding. I just explain the concept on how to approach the question, and hopefully along the way, it ring a bell inside his head. That why I try to handoff, siong sometime with some of the questions.

The concept for the maths is mainly to stretch them, and you will be surprise what the kids can do sometimes by leaving them alone to work on it. If they can do it, you can sense their satisfaction in cracking the question.

And if the question is beyond both of us, usually it is ok, as the teacher will show them the solution in the next lesson, or they find out from their classmate.

So my recommendation is minimum interference, let kids figure out themselves first, be it by themselves or discussion with their classmates, and offer now and then some help if they are really clueless.