My girl 3years plus now. Recently her childcare teacher said if she raise her voice at her for doing something not so right, my girl will cry either silently at a corner or backface her and cry.. this breaks my heart.. at home she also cry easily if we never give in to her or raise our voice.. is this normal? What can we do?

don't worry about it. I had this experience with my child too. Just depends on parents how to take care and communication with child. Went to KK Children specialist also nothing much help... The situation will be going alright then if more communication and spend more time to teach her. The kids nowadays are clever than last time.