A basic keyword search is the most frequent technique used by teachers looking for reusable Educational Resources (ER). Despite the abundance of ERs on the Web, many remain undiscovered because they are not well connected. In addition, usage rights issues arising from incompatible licences of ERs are a barrier for teachers. In this demonstration, we introduce the CLARA search engine, a web application based on a knowledge graph designed to help teachers in discovering relevant and license-compatible ERs. Based on a set of subjects given by a teacher, the CLARA search engine provides a ranked set of ERs that can be bookmarked to be reused in a new course. The licenses of bookmarked ERs are organised within a compatibility graph, which suggests the licenses that could protect the new course based on the compatibility of the licenses of the bookmarked ERs.