Teaching ladder LinkedIn Crossclimb #818: students solve 5 clues before touching order. Answers: NONE, CONE, CORE, CORN, COIN. Only then drag rungs until each neighbor differs by exactly one letter.
Middle phase answers: "“A friend to all is a friend to ___” (Aristotle)" = NONE; "Edible holder for ice cream" = CONE; "Part of an apple that contains its seeds" = CORE; "Cereal crop that might appear at breakfast in “flake” form" = CORN; "Piece of metal currency that may be flipped" = COIN.
Ordering phase: the valid middle chain is NONE → CONE → CORE → CORN → COIN. This permutation is the only valid one-letter chain for these answers.
Rule demo: NOSE and NONE differ in exactly one slot — S→N at the third letter (NOSE → NONE).
Rule demo: NONE and CONE differ in exactly one slot — N→C at the first letter (NONE → CONE).
Rule demo: CONE and CORE differ in exactly one slot — N→R at the third letter (CONE → CORE).
Rule demo: CORE and CORN differ in exactly one slot — E→N at the fourth letter (CORE → CORN).
Rule demo: CORN and COIN differ in exactly one slot — R→I at the third letter (CORN → COIN).
Rule demo: COIN and CHIN differ in exactly one slot — O→H at the second letter (COIN → CHIN).
Lesson complete: NOSE → NONE → CONE → CORE → CORN → COIN → CHIN. Remember — middles first, order second, combo last.