vocab: stop re-teaching a word later in the same session (239 tags)

A word tagged VOCAB in one activity was tagged again in later activities of the
same session, so the learner got the same chip repeatedly — most visibly in the
pronunciation drills, which re-listed every word from the dialogue before them
(reported: book 7 session 1-2). Rule applied: drop a VOCAB whose word was
already tagged in an EARLIER activity of that session. Repeats INSIDE one
activity are kept — those teach distinct senses ('stuck to his finger' vs
'stuck the milk in the fridge', 'shop' as verb then noun). Also dropped chips
for plurals of already-known words in book 7 session 1-2, where the drill
teaches the singular/plural pair rather than new vocabulary. No session lost
all of its vocabulary (verified).

Co-authored-by: Cursor <cursoragent@cursor.com>

book-5-lesson-3.module

@@ -69,14 +69,11 @@ INTRO: Now the telephone words from the tape — one phone on the desk, one on t
 INSTRUCTION: Repeat each word and sentence.
 REPEAT
 
-VOCAB: telephone
-VOCAB: phone
 VOCAB: to call
 LINE: There's a telephone on the desk. {page_057_001.jpg} {bk05-l3a-f1-01.mp3}
 LINE: There's also a phone on the wall. {page_057_001.jpg} {bk05-l3a-f1-02.mp3}
 LINE: You can call your friend on that phone. {page_057_001.jpg} {bk05-l3a-f1-03.mp3}
 
-VOCAB: button
 VOCAB: push-button
 VOCAB: to push
 VOCAB: first
@@ -134,13 +131,11 @@ ID: 3a-f3
 INTRO: The Wilsons drove from Dallas to Los Angeles — four days each way, and Mr. Wilson almost never stopped the car. Just listen to the story of their trip.
 INSTRUCTION: Listen to the sentences.
 
-VOCAB: trip
 VOCAB: to take a trip
 LINE: The Wilsons take a trip every summer. {page_058_001.jpg} {bk05-l3a-f3-01.mp3}
 LINE: Last year they took a trip to Los Angeles. {page_058_001.jpg} {bk05-l3a-f3-02.mp3}
 LINE: They had a good trip. {page_058_001.jpg} {bk05-l3a-f3-03.mp3}
 
-VOCAB: suitcase
 VOCAB: to pack
 LINE: They brought new suitcases. {page_058_002.jpg} {bk05-l3a-f3-04.mp3}
 LINE: They packed their clothes, toothbrushes, and shampoo in the suitcases. {page_058_002.jpg} {bk05-l3a-f3-05.mp3}
@@ -372,15 +367,12 @@ LINE: Linda went back to New York after a few days.
 VOCAB: in
 LINE: She went to the store and came back in ten minutes.
 
-VOCAB: return
 LINE: Ann went to the store and returned in thirty minutes.
 LINE: Linda returned to New York after a few days.
 LINE: I want to return this book to the library.
 
-VOCAB: one-way
 LINE: He took a one-way trip to Europe. He doesn't want to return.
 
-VOCAB: round-trip
 LINE: I have a round-trip ticket to Austin. I want to come back tomorrow.
 
 # Source: ST §The Flight Arrives Tonight
@@ -390,10 +382,8 @@ INTRO: Now the airport words: flights arrive and depart, and somebody is usually
 INSTRUCTION: Repeat the words and sentences.
 REPEAT
 
-VOCAB: flight
 LINE: A trip on a plane is a flight.
 
-VOCAB: airport
 LINE: There are many planes at an airport.
 
 VOCAB: arrive
@@ -465,7 +455,6 @@ VOCAB: travel agency
 VOCAB: reservation
 VOCAB: customer
 VOCAB: together
-VOCAB: tonight
 VOCAB: to pick up
 LINE: Mrs. Brown is a travel agent. {page_063_001.jpg} {bk05-l3b-f1-01.mp3}
 LINE: She works in a travel agency. {page_063_001.jpg} {bk05-l3b-f1-02.mp3}
@@ -523,9 +512,6 @@ INSTRUCTION: Listen and repeat each line.
 REPEAT
 
 VOCAB: to meet
-VOCAB: arrival
-VOCAB: gate
-VOCAB: departure
 
 Mark: Hello, Alan. Are you taking a trip, too? {page_064_001.jpg} {bk05-l3b-f2-01.mp3}
 Alan: No, I need to meet the Wilsons' flight. {page_064_001.jpg} {bk05-l3b-f2-02.mp3}