Koch Lesson 5: Add the Letter A

Why this step

A is the most common English letter after E and T, but Koch withheld it until the ear can hold five other shapes. Now you get a two-element mixed letter: dit then dah.

What to hear

A is short: “dit-dah.” R is longer: “dit-dah-dit.” If you hear a trailing dit after A, you over-copied into R. U starts with two dits; A starts with one.

Drill

Active set: K, M, R, S, U, A. English words are still limited; copy random letters. When A is easy, you will later glue it onto real words in the Word List module — not yet.

Letter groups you can type in the translator once the ear is warm: AR, AM, AS, KA

Pitfall

Because A is famous, people “fill it in” from context. Koch quizzes isolated letters so that cheat is unavailable.