How do we prepare our child for PSLE and avoid them taking unnecessary stress?

Firstly, explain to your child that this exam won't define him (it really won't). Let him study at his own pace. If he needs additional help, get him/her a tutor. Monitor closely the progression. Also introducing sports/a hobby is a good distraction and break from their already hectic school lives. Listen to music together, swim, indulge in art & craft, cycle, take walks in the park... just get him to do other things than study all day. Hope this helps!