and light; Living Things: plants, trees, ocean animals, birds and animals). The two social studies themes were Places Where We Live and Go and Earth–Land and Water. Within these themes, weekly lesson units were organized around six smaller topics. For Places Where We Live and Go, the weekly lesson units included cities,homes, school, and stores. For Earth–Land and Water, the weekly units included 2 weeks of overview of land and water, and an ocean unit. Thus, intervention teachers implemented a total of 18 thematic units to accelerate vocabulary knowledge.