Bosos.nl, the development tracking model for groups 1 and 2Already in the playgroup and daycare center, children are laid the foundation for further development in all areas. It is therefore important that this development is monitored as clearly and carefully as possible and is mapped out as concretely as possible. Based on this careful working method, the teacher can make decisions that are essential for a childs future. To achieve this, various healthcare components must be integrated.