The article says that the kid was absent or late for 272 days in 3 years. That's over 50% of school days.
Regardless of whether the school had made the mandated phone call about absence issues to the kid's mother, "the school failed him" would not be the first phrase I would use to describe the situation. It's possible that the school did fail him; maybe he was bullied and going to school was unbearable! But if that was the case, I am surprised that a sympathetic article about the kid and his mother failed to mention it.