  In this paper we present the Open Software Services for Classrooms and
Research (OSSCAR) platform. OSSCAR provides an open collaborative environment
to develop, deploy and access educational resources in the form of web
applications. To minimize efforts in the creation and use of new educational
material, it combines software tools that have emerged as standards with custom
domain-specific ones. The technical solutions adopted to create and distribute
content are described and motivated on the basis of reliability,
sustainability, ease of uptake and use. Examples from courses in the domains of
physics, chemistry, and materials science are shown to demonstrate the style
and level of interactivity of typical applications. The tools presented are
easy to use, and create a uniform and open environment exploitable by a large
community of teachers, students, and researchers with the goal of facilitating
learning and avoiding, when possible, duplication of efforts in creating
teaching material. Contributions to expand the educational content of the
OSSCAR project are welcome.
