Higher levels of screen time in early childhood are associated with lower scores in reading and mathematics on Ontario's standardized tests, with each additional hour of daily screen time associated with a 10% drop in the likelihood of achieving higher academic levels. Published in JAMA Network Open, the findings are part of a new study from TARGet Kids!, a collaborative research network co-led by Dr. Catherine Birken at The Hospital for Sick Children (SickKids) and Dr. Jonathon Maguire at Unity Health Toronto's St. Michael's Hospital.