Developing lesson plans is a large part of a teacher's workload. Although there are many curricula online, most of them are not tested or based in reserch.
ConnectingSTEM brings free STEM curricula for all educators, researchers, and instructional designers in science, technology, engineering, and mathematics.
Integrated Elementary Activities
Integrated Technology, Engineering, & Design Education Activities For the Elementary School These free activities were developed by elementary school teachers in collaboration with NC State University. These hands-on activities are meant to augment instruction and provide engaging and meaningful STEM lessons to K-5 students. The activities provide the appropriate grade range, time frame, curricular alignment, technology education integration, objectives, and needed materials.