Providing effective services to promote development of all children is the goal of programs serving young children; this is especially important for programs that include young children who have disabilities or are at risk. Ensuring effectiveness of programming for each individual child can be difficult, and many children will need individualized interventions to address their specific goals. It is essential that these interventions be planned and implemented well. In fact, the Division for Early Childhood (DEC) of the Council of Exceptional Children (CEC) recommends practices addressing this issue with the guideline stating that, "Recommended instructional strategies are used with sufficient fidelity, consistency, frequency, and intensity to ensure high levels of behavior occurring frequently" (Wolery, 2002, p. 37). This article describes assessment of intervention integrity and child progress monitoring components teachers can use to help ensure effectiveness of individual interventions. (Contains 2 tables.)