Hi Lifeiyu,
Just visit holygrail.moe
It’s a free site with the best possible resources your daughter can get her hands on. All the top students in schools use this site.
If she needs additional help, can consider tuition. Those low-cost 1-1 type, BUT the tutor will likely be someone who just completed o’lvls. Usually agar agar 25/hr. If need recommendation can dm me.