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-7-lesson-3.module

@@ -82,18 +82,13 @@ ID: l3-s1
 INTRO: The Clark family just bought a house — white walls, a red roof, and a yard big enough to lose a dog in. Listen and read along.
 INSTRUCTION: Listen and read.
 
-VOCAB: roof
-VOCAB: garage
 Narrator: Two weeks ago Mr. and Mrs. Clark bought a house. The house is white with a red roof.
 LINE: It has seven rooms and a garage for the car.
 
-VOCAB: yard
 VOCAB: front yard
 VOCAB: flowers
-VOCAB: grass
 LINE: The house has a big yard. The front yard has flowers, grass, and a tree. {st-page_085_001.jpg}
 
-VOCAB: front
 LINE: The other tree is near the front of the house. {st-page_085_001.jpg}
 
 VOCAB: backyard
@@ -104,11 +99,8 @@ LINE: The backyard is inside the fence.
 VOCAB: back door
 LINE: The fence has a gate near the back door of the house.
 
-VOCAB: back
 LINE: The trees in the back are taller than the roof.
 
-VOCAB: leaf
-VOCAB: leaves
 LINE: It is summer now. The trees have leaves, and the grass is green. {st-page_085_003.jpg}
 LINE: In the winter, the grass will be brown. There won't be any leaves on the trees or any flowers in the yard. {st-page_085_002.jpg}
 
@@ -428,7 +420,6 @@ REPEAT
 VOCAB: by
 LINE: The book is by the chair. {page_070_001.jpg} {bk07-l3b-f3-01.mp3}
 
-VOCAB: next to
 LINE: By and next to are the same. {page_070_001.jpg} {bk07-l3b-f3-02.mp3}
 
 VOCAB: fence
@@ -1069,17 +1060,13 @@ INTRO: The same sky words on the cassette, one picture each. Listen and repeat.
 INSTRUCTION: Listen and repeat.
 REPEAT
 
-VOCAB: moon
 LINE: The moon shines at night. {page_076_001.jpg} {bk07-l3c-f4-01.mp3}
 
-VOCAB: earth
 LINE: The earth circles the sun. {page_076_002.jpg} {bk07-l3c-f4-02.mp3}
 
 VOCAB: stars
 LINE: The stars are high above the earth. {page_076_003.jpg} {bk07-l3c-f4-03.mp3}
 
-VOCAB: world
-VOCAB: land
 LINE: A map of the world shows both land and water. {page_076_004.jpg} {bk07-l3c-f4-04.mp3}
 
 VOCAB: around