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-11-lesson-3.module

@@ -881,25 +881,20 @@ ID: l3-s9
 INTRO: Here's the story of Jim, a hose, and four dollars. Listen and read — you'll answer questions about it next.
 INSTRUCTION: Listen to the story.
 
-VOCAB: hose
 Narrator: Jim bought a new hose for his yard at the U-Save Department Store yesterday. {st-page_094_001.jpg}
 
 VOCAB: on sale
 LINE: When he read the paper this morning, he saw that the same kind of hose was on sale at another store for four dollars less. {st-page_094_001.jpg}
 LINE: He was unhappy because he paid the regular price for his hose, but he thought it was a good one. {st-page_094_001.jpg}
 
-VOCAB: leak
 LINE: Later Jim fastened his new hose to an outside faucet and turned on the water. The hose leaked! {st-page_094_002.jpg}
 LINE: He decided to go back to the U-Save Store and tell the clerk that he didn't need a hose with a leak in it. {st-page_094_002.jpg}
 
 VOCAB: leaky
-VOCAB: exchange
 LINE: The clerk took the leaky hose and said, "I'll be happy to exchange this for another hose." {st-page_095_001.jpg}
 
-VOCAB: refund
 LINE: When Jim told her that he didn't want to exchange it, she said, "Do you want me to credit your account with the cost of the hose?" He answered, "No, I'd like to get a refund." {st-page_095_001.jpg}
 
-VOCAB: give back
 VOCAB: sales slip
 LINE: "I can certainly give back your money," the clerk said. "Do you still have your sales slip?" {st-page_095_001.jpg}
 LINE: After Jim showed it to her, she refunded his money. {st-page_095_001.jpg}
@@ -961,16 +956,13 @@ REPEAT
 VOCAB: satisfy
 Willie: I think I'll order another hamburger. The first one was good, but it didn't satisfy me. I'm still hungry. {st-page_096_001.jpg}
 
-VOCAB: satisfied
 Walter: I'm glad you like the food here. I'm certainly not satisfied with it. {st-page_096_001.jpg}
 
-VOCAB: unhappy
 Willie: I didn't realize that you were unhappy. What's wrong? {st-page_096_001.jpg}
 
 VOCAB: greasy
 Walter: My food is greasy. Look at the grease on this piece of chicken! {st-page_096_001.jpg}
 
-VOCAB: dissatisfied
 Willie: Yes, I see. How is the salad? Are you dissatisfied with it, too? {st-page_096_001.jpg}
 
 VOCAB: oily