The HCRC identifies, through analysis of new data and re-analyses of existing data, key elements of effective early childhood programs. Once identified and better understood, these "active ingredients" can be used as a framework to develop more effective programs and improve existing practices. Among the principles that are being assessed through research syntheses and data analysis of different studies are:
- Timing
- Duration
- Comprehensiveness of services
- Professional training of staff
- Intensity
- Group or class sizes
- Organizational setting
- Transition services