This document presents a solution for cloud computing interoperability in education. It discusses the problems of managing different devices and a lack of resources. The proposed solution is interoperability through a system architecture that uses ontologies. The architecture includes a cloud computing catalog, service contracts, and policies. Ontologies like OWL-S and a cloud service ontology are used to remove ambiguity and unify descriptions. An implementation loads distribution and administration through the system. The conclusion discusses advantages like cost reduction and future work on expanded usage and protection.