  In this work, we describe strategies and provide case-study activities that
can be used to examine the properties of superposition, entanglement, tagging,
complementarity, and measurement in quantum curricula geared for teacher
training. Having a solid foundation in these conceptual ideas is critical for
educators who will be adopting quantum ideas within the classroom. Yet they are
some of the most difficult concepts to master. We show how one can
systematically develop these conceptual foundations with thought experiments on
light and with thought experiments that employ the Stern-Gerlach experiment. We
emphasize the importance of computer animations in aiding the instruction on
these concepts.
