Learning and teaching about cross-cutting subject matter The photograph above show a fully disassembled mini digital camera - Only the plastic housing and the metal chassis does not contain electronic elements. Everything inside is related to sophisticated electronics and computing - Using cross cutting principles in STEM, learners can quickly see how this small camera uses principles of : Physics (electricity, mechanics, energy, optics and light and sound), Design and technology (Design Thinking, engineering, electronic, metalwork and production), Computer Science (microprocessors), Chemistry (plastics and coatings). Mathematics (engineering calculations)