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-12-lesson-3.module

@@ -176,7 +176,6 @@ LINE: My house is in a suburb, away from the downtown area. {st-page_081_001.jpg
 
 VOCAB: two-story
 VOCAB: floor
-VOCAB: story
 LINE: It's a two-story house; it has two floors or stories. {st-page_081_001.jpg}
 
 VOCAB: near
@@ -186,9 +185,7 @@ LINE: We're home! {st-page_081_002.jpg}
 
 LINE: Let's go inside. {st-page_081_003.jpg}
 
-VOCAB: fireplace
 VOCAB: builder
-VOCAB: fire
 LINE: Let me show you my house. This is the living room. How do you like our fireplace? Nice, isn't it? The builder did a very good job. On very cold days, we make great fires. {st-page_081_004.jpg}
 
 # Source: ST §My House Is in the Suburbs (questions)
@@ -228,21 +225,13 @@ INTRO: The tour continues — the stereo, the kitchen, and the patio. Repeat the
 INSTRUCTION: Repeat the new words, then read the paragraphs.
 REPEAT
 
-VOCAB: stereo
 VOCAB: to play | play
-VOCAB: record
-VOCAB: cassette
 LINE: That's our new stereo over there. Perhaps you would like to listen to some music later. Maybe we can play Michael Johnson's new record. Or perhaps, we can play some of the cassettes that I just received in the mail. {st-page_082_001.jpg}
 
-VOCAB: dining room
-VOCAB: microwave
-VOCAB: oven
 VOCAB: to heat | heat
 VOCAB: to boil | boil
 LINE: Now let's go to the dining room and kitchen. We eat dinner in the dining room, but we usually eat breakfast here in the kitchen. This is our new microwave oven. The stove's oven wasn't quick enough for us. So now we can heat water for coffee in one minute, and boil it to make soup in three minutes! {st-page_082_002.jpg}
 
-VOCAB: patio
-VOCAB: wood
 VOCAB: shed
 VOCAB: to burn | burn
 LINE: If you look out the glass door, you can see our patio. In the summers, we eat out there sometimes. We keep wood for our fireplace in that shed. You know wood burns much better if you keep it dry. {st-page_082_003.jpg}
@@ -506,7 +495,6 @@ Anita: Boy, some of these family get-togethers can be very tiring! {st-page_085_
 Oscar: The trouble is we don't have enough room for all the kids to play in.
 Anita: And we don't have room for all the cooking that takes place when everybody is here.
 
-VOCAB: idea
 Oscar: I have an idea that just might solve our problem.
 Anita: Let's hear your solution.
 
@@ -567,7 +555,6 @@ Anita: When all my sisters, my mother, and I get together, we just don't have en
 Carol: But you only get together a few days out of the year.
 Anita: I know, but these get-togethers are very important to us.
 
-VOCAB: near
 Carol: Are you planning to do this in the near future?
 Anita: Well, Oscar has already built the kitchen wall. He wants to build the den right after he finishes the wall.
 Carol: Then it should be ready for your next get-together.