STEM is a holistic approach composed of understanding, managing, designing and questioning processes. It is erected upon four strong pillars: Science, Technology, Engineering and Mathematics.
Science provides the knowledge; key facts, concepts, principles and laws which govern the Nature. It also gives us the urge to unravel the unsolved mysteries of the Universe.
Technology provides all necessary tools to make human life more practical. Human needs and desires change constantly, so Technology exists to fulfill them.
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Engineering looks for solutions to new world problems through applying rigorous design processes.
Mathematics is the path to logic, which then leads to well-founded judgements. Mathematics paves the path for all other STEM fields.
It is not just about numbers!