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-6-lesson-3.module

@@ -117,9 +117,7 @@ LINE: She had to send them in the mail. {page_053_001.jpg} {bk06-l3a-f1-01h.mp3}
 LINE: on {bk06-l3a-f1-02a.mp3}
 VOCAB: package
 LINE: package {bk06-l3a-f1-02b.mp3}
-VOCAB: address
 LINE: address {bk06-l3a-f1-02c.mp3}
-VOCAB: street
 LINE: street {bk06-l3a-f1-02d.mp3}
 
 LINE: She wrote his name on the package. {page_053_002.jpg} {bk06-l3a-f1-02e.mp3}
@@ -137,9 +135,7 @@ LINE: She saw a postcard from her brother. {page_053_003.jpg} {bk06-l3a-f1-03d.m
 LINE: It had his address on it. {page_053_003.jpg} {bk06-l3a-f1-03e.mp3}
 LINE: She finished the package. {page_053_003.jpg} {bk06-l3a-f1-03f.mp3}
 
-VOCAB: post office
 LINE: post office {bk06-l3a-f1-04a.mp3}
-VOCAB: stamp
 LINE: stamps {bk06-l3a-f1-04b.mp3}
 LINE: mail, mailed {bk06-l3a-f1-04c.mp3}
 
@@ -592,14 +588,10 @@ INTRO: Now hear the key bank words one at a time, each with its picture. Repeat
 INSTRUCTION: Listen and repeat each word.
 REPEAT
 
-VOCAB: driver's license
 LINE: Driver's license. {page_059_001.jpg} {bk06-l3b-f1-01.mp3}
 
-VOCAB: traveler's check
 LINE: Traveler's check. {page_059_002.jpg} {bk06-l3b-f1-02.mp3}
 
-VOCAB: bank
-VOCAB: teller
 LINE: Bank. Teller. {page_059_003.jpg} {bk06-l3b-f1-03.mp3}
 
 VOCAB: check
@@ -608,7 +600,6 @@ LINE: Check. {page_059_004.jpg} {bk06-l3b-f1-04.mp3}
 VOCAB: money order
 LINE: Money order. {page_059_005.jpg} {bk06-l3b-f1-05.mp3}
 
-VOCAB: identification
 LINE: Identification. {page_059_006.jpg} {bk06-l3b-f1-06.mp3}
 
 # Source: LLA 3B Figure 1 (part 2)
@@ -767,7 +758,6 @@ INTRO: Buses, movies, mess halls at noon — wherever you go, everyone else had
 INSTRUCTION: Listen and repeat.
 REPEAT
 
-VOCAB: crowded
 LINE: A lot of people are there. {page_062_001.jpg} {bk06-l3b-f6-01a.mp3}
 LINE: The store is crowded. {page_062_001.jpg} {bk06-l3b-f6-01b.mp3}
 
@@ -775,7 +765,6 @@ LINE: There are 20 students in the classroom. {page_062_002.jpg} {bk06-l3b-f6-02
 LINE: There are 20 chairs in the classroom. {page_062_002.jpg} {bk06-l3b-f6-02b.mp3}
 LINE: The classroom is crowded. {page_062_002.jpg} {bk06-l3b-f6-02c.mp3}
 
-VOCAB: in line
 LINE: Many people want to get on the bus. {page_062_003.jpg} {bk06-l3b-f6-03a.mp3}
 LINE: They are standing in line at the bus stop. {page_062_003.jpg} {bk06-l3b-f6-03b.mp3}
 LINE: The bus will be crowded. {page_062_003.jpg} {bk06-l3b-f6-03c.mp3}