In my experience, resource hoarding is mainly by aspirational families rather than the very highly gifted. As a family, we appreciate that our best resource is our collective mind and we share wide, deep, challenging discussions which exercise and stretch our individual intellects. We’ve always been very happy to share. When my eldest was at high school, her mobile phone constantly buzzed with requests for help from all her classmates and she’d always respond even when she had her own tasks to do. Her generosity paid off - when she started Uni, she became one of the most highly sought tutors in our local area (many of her students are the offspring of teachers).
