Why do primary teachers need to have a good understanding of child development? Every child you teach will be unique, each growing up in a family with its own culture and range of experiences. Those home and community experiences form the very basis of children’s developmental trajectories. Children draw upon knowledge and experience from their wider life to make sense of learning in the classroom. Teachers need to know about child development so that the classroom experiences we offer acknowledge the uniqueness of each pupil throughout the primary school, ensuring all can progress.