Teaching ladder LinkedIn Crossclimb #783: students solve 5 clues before touching order. Answers: PEAK, PERK, PORK, PORE, CORE. Only then drag rungs until each neighbor differs by exactly one letter.
Middle phase answers: "Highest point of a mountain" = PEAK; "Bonus earned at a job like a gym membership or free meal" = PERK; "Meat from a pig" = PORK; "Tiny skin opening" = PORE; "Part of an apple that is left over after eating" = CORE.
Ordering phase: the valid middle chain is PEAK → PERK → PORK → PORE → CORE. This permutation is the only valid one-letter chain for these answers.
Rule demo: PEAS and PEAK differ in exactly one slot — S→K at the fourth letter (PEAS → PEAK).
Rule demo: PEAK and PERK differ in exactly one slot — A→R at the third letter (PEAK → PERK).
Rule demo: PERK and PORK differ in exactly one slot — E→O at the second letter (PERK → PORK).
Rule demo: PORK and PORE differ in exactly one slot — K→E at the fourth letter (PORK → PORE).
Rule demo: PORE and CORE differ in exactly one slot — P→C at the first letter (PORE → CORE).
Rule demo: CORE and CORN differ in exactly one slot — E→N at the fourth letter (CORE → CORN).
Lesson complete: PEAS → PEAK → PERK → PORK → PORE → CORE → CORN. Remember — middles first, order second, combo last.