LO1: Extension of the number system from real numbers to complex numbers Open index.html for local preview, or upload the ZIP in this folder to SLS as an interactive resource. The activity contains six progressive stages, touch/keyboard access, read-aloud, misconception-specific remediation, and teacher learning evidence. Numeric response stages use a locally bundled MathLive mathematical editor. Learners may enter exact fractions, roots, powers, pi, or decimals; no internet connection is required. The proven xAPI libraries and injected xAPI head block are copied byte-for-byte from the supplied reference ZIP.