ECA offers clients materials management services. We do not develop or sell curriculum. However, we have a strong bias toward inquiry-based curriculums. ECA's owner and President, Dennis Harlan, has studied effective strategies for implementing kit-based science programs since 1985. Dennis Harlan was the Principal Investigator of a project funded by the National Science Foundation that documents, on video tape, effective practices used to implement and sustain hands-on, inquiry-based science programs.