In the world we live in there are powerful broad frameworks for understanding specific objects; relationships and events. This paper focuses the learning and understanding of one such framework; namely; technological systems; which are complex systems of technical and human components that facilitate much of the experienced needs of modern society. Technological systems are constituted of transformation and transport; acting on matter; energy and information. This paper outlines a larger project; which is expected to contribute substantially to a pedagogical knowledge base for systems thinking in technology. The specific focus of the paper will be the first step in the project â€“ the development of a design for learning technological systems in Swedish compulsory school based on previous empirical studies as well as theoretical principles. The core of that design revolves around creating patterns of variation supporting the separation and differentiation in and between four empirically identified dimensions of variation: resource; intention; internal structure and external structure. It also includes patterns of variation that support the fusion of these dimensions and simultaneous awareness of several different technological systems; focusing their systemic nature.