Progress monitoring and data-based intervention decision making have become key components of providing evidence-based early childhood special education services. Unfortunately, there is a lack of tools to support early childhood service providers' decision-making efforts. The authors describe a Web-based system that guides service providers through a decision-making process informed by child performance on Infant and Toddler IGDIs (Individual Growth and Development Indicators), the provider's professional judgment, and information from the child's primary caregiver. Using a case example, the authors describe how a service provider integrates the system into an existing service delivery model. Finally, they describe barriers and potential solutions to implementation within the context of a traditional early childhood service delivery model and implications for policy and practice. (Contains 5 figures.)