The Territory-wide System Assessment (TSA) is generating heated debate among politicians and parents alike. The arguments on both sides have validity, but all stakeholders should prioritise the many needs of the true beneficiary of their decisions – our children. We are concerned that structured schooling and assessment exercises come at the expense of time for sleep, rest and play. The importance of sleep and play in a child’s neurocognitive and psychosocial development has been shown repeatedly in rigorous scientific research. Children and teenagers need more sleep than adults. Sleep is vital to health, physically and mentally. For the developing brain, the impact of sleep deprivation can have serious long-term biological consequences The body restores itself in sleep. We also know that sleep is essential to learning, especially the consolidation of learned materials. Ample scientific evidence has shown that those who sleep more perform better academically. We are also beginning to understand the role sleep plays in emotional well-being. Simply put, when we are sleep-deprived, we are more prone to sickness, bad moods, risky behaviour, and are less effective and efficient in our work. For the developing brain, the impact of sleep deprivation can have serious long-term biological consequences. Play is a human right. Emerging evidence suggests that play helps children develop important social and cognitive skills. Children learn to share, see other perspectives, deal with different emotions, and forgive. Surveys indicate that Hong Kong children do not spend much time playing, let alone playing with their parents, especially fathers. In addition to depriving children of the chance to develop important skills, this may prevent them from developing emotional bonding, which forms the basis for future development of relationships and well-being. READ MORE: Reviled standard school test is a scapegoat for Hong Kong’s flawed education system Hong Kong is a performance-oriented society. We empathise with the pressure on parents and schools to help young ones “get ahead”. Paradoxically, studying at the expense of sleep and play puts our children at risk of poor cognitive and social development so, instead of getting ahead, they might lose the “golden period” of brain growth that is critical for all kinds of functioning. Even for the most achievement-oriented parents and schools, more exams and drilling at the expense of sleep and play defeats the purpose of advancing children’s growth. Fundamentally, we want our children to be happy. Parents should ask themselves whether the getting ahead paradigm is still the most conducive means to that end. We have a responsibility to protect our children. That should include their rights to rest and play. Christian Chan and Esther Lau teach psychology at the University of Hong Kong and Hong Kong Institute of Education respectively