Biology by Bradford
Biology by Bradford
A trigger and an outcome. Lay the steps between them - in order, and only the ones doing real work.
Learning objective: building a causal chain where every step follows physically from the one before - and learning to leave out the true-but-irrelevant. Extra steps cost marks here, the same habit that loses marks in "explain" questions.
Your hand · tap to place, tap a placed step to take it back
Every wrong tile is labelled with the reasoning error it represents - teleology, wrong direction, off-path, upstream, level-skip, or wrong mechanism. Six labels, reused across every chain, so students start hearing them in their own writing. The canonical chain is always shown after grading.
Download today's chain as one self-contained HTML file: no login, no tracking, easy to drop into a VLE or share directly with a class.