Early Intervention Foundation (EIF) | 3,182 followers on LinkedIn. Championing evidence in early intervention/children's social care. | We’ve moved! Following our merger with What Works for Children’s Social Care, you can now find us at Foundations – What Works Centre for Children & Families. As a newly launched organisation, we will be researching and evaluating the effectiveness of family support services and interventions, and generating the actionable evidence needed to improve them, so more vulnerable children can live safely and happily at home with the foundations they need to reach their full potential.