Teaching ladder LinkedIn Crossclimb #883: students solve 5 clues before touching order. Answers: FRET, FEET, FELT, FELL, FILL. Only then drag rungs until each neighbor differs by exactly one letter.
Middle phase answers: "Constantly worry, or part of a guitar's neck" = FRET; "Body parts with arches and soles" = FEET; "Soft surface on a billiards table" = FELT; "Went to the ground, most likely accidentally" = FELL; "Pour liquid into, as a glass" = FILL.
Ordering phase: the valid middle chain is FRET → FEET → FELT → FELL → FILL. This permutation is the only valid one-letter chain for these answers.
Rule demo: FREE and FRET differ in exactly one slot — E→T at the fourth letter (FREE → FRET).
Rule demo: FRET and FEET differ in exactly one slot — R→E at the second letter (FRET → FEET).
Rule demo: FEET and FELT differ in exactly one slot — E→L at the third letter (FEET → FELT).
Rule demo: FELT and FELL differ in exactly one slot — T→L at the fourth letter (FELT → FELL).
Rule demo: FELL and FILL differ in exactly one slot — E→I at the second letter (FELL → FILL).
Rule demo: FILL and WILL differ in exactly one slot — F→W at the first letter (FILL → WILL).
Lesson complete: FREE → FRET → FEET → FELT → FELL → FILL → WILL. Remember — middles first, order second, combo last.