I really feel for your friend, it must be so stressful seeing her little one come home with injuries and not feeling fully confident in the centre. A few names that come up often among parents in the central area are MindChamps and Pat's Schoolhouse, both of which have branches not too far from Newton and generally have a good reputation for attentive teachers. It might be worth visiting a couple of centres in person to observe the teacher-to-child ratio and see how the teachers interact with the toddlers, since that can tell you a lot more than reviews alone. Hoping your friend finds a safe and nurturing place for her child soon lah, it really makes such a big difference at this age.