Despite the relevance of DC circuits in everyday life and schools, they have been shown to cause
numerous learning difficulties at various school levels. In the course of this article, we present a
flexible method for teaching DC circuits at lower secondary level. The method is labelled as hidden
circuits, and the essential idea underlying hidden circuits is in hiding the actual wiring of DC
circuits, but to make their behaviour evident for pupils. Pupils are expected to find out the wiring
of the circuit which should enhance their learning of DC circuits. We present two possible ways to
utilise hidden circuits in a classroom. First, they can be used to test and enhance pupils’
conceptual understanding when pupils are expected to find out which one of the offered circuit
diagram options corresponds to the actual circuit shown. This method aims to get pupils to evaluate
the circuits holistically rather than locally, and as a part of that aim this method highlights any
learning di…