4.Another measure could be encouraging friendships between children in different school years to mirror the unsupervised mixed-age playgroups in hunter-gatherer communities.
7.Chief executive Caroline Slocock cited the dilemma of a working mother who had to collect a toddler from playgroup but was faced with an office culture that valued late working.
8.While hunter-gatherer children learnt from observation and imitation in mixed-age playgroups, researchers said that western " instructive teaching" , where pupils are asked to sit still, may contribute to conditions such as attention deficit hyperactivity disorder.