Add Wortschatz & Grammatik A1 Abschnitt K (Adjektive)

Predicative adjectives with sein (reinforces Menschen L4) and irregular
comparative/superlative of gut/viel/gern (pp. 85-86) - the latter is new
grammar not covered anywhere in Menschen A1.1.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

Ergaenzung/INDEX.md

@@ -27,6 +27,7 @@ inside each Abschnitt file instead.
 
 | I | [Verben](wortschatz-grammatik-a1/abschnitt-i.md) | 70–78 | L1-4, L7, L9, L11, L12 (Imperativ, müssen/wollen/dürfen, würden-Bitten new/A2) | done |
 | J | [Nomen und Artikel](wortschatz-grammatik-a1/abschnitt-j.md) | 79–84 | L2, L3, L5, L6 (Possessivartikel case declension new) | done |
+| K | [Adjektive](wortschatz-grammatik-a1/abschnitt-k.md) | 85–86 | L4 (Komparativ/Superlativ of gut/viel/gern new) | done |
 
 ## Hören & Sprechen A1 (`hoeren-sprechen-a1/`)
 

Ergaenzung/wortschatz-grammatik-a1/abschnitt-k.md

@@ -0,0 +1,67 @@
+# Wortschatz & Grammatik A1 — Abschnitt K: Adjektive
+
+Seiten 85–86 (Teil 2 Grammatik) · Lösungen S. 113 · Übungen K1–K2
+
+## Overview
+
+- Skill focus: Grammatik (predicative adjectives with sein, comparative/
+  superlative of gut/viel/gern)
+- Topic: describing people/objects with adjective + sein, irregular
+  comparison forms
+- Relates to *Menschen* Lektion(en): **L4** (Der Tisch ist schön —
+  predicative adjectives with sein; K1 directly reinforces this
+  pattern). **New beyond Menschen A1.1**: **K2's comparative/superlative
+  forms of gut, viel, gern are entirely new** — Menschen A1.1 does not
+  teach comparison (Komparativ/Superlativ) at all, irregular or regular.
+
+## Grammar covered
+
+### K1: Predicative adjectives with sein (reinforces Menschen L4)
+Simple pattern: [Subject] + ist/sind + [adjective]. Menschen A1.1's "Der
+Tisch ist schön" pattern extended to 10 more subject/adjective pairs.
+
+### K2: Steigerung (comparison) of gut, viel, gern — **new grammar**
+
+These three adjectives/adverbs are irregular in German (like
+good/better/best in English) and are **not covered anywhere in Menschen
+A1.1**:
+
+| Grundform | Komparativ | Superlativ |
+|---|---|---|
+| gut (good) | besser | am besten |
+| viel (much/a lot) | mehr | am meisten |
+| gern (gladly/like to) | lieber | am liebsten |
+
+Pattern: **lieber** = "prefer to" (Ich trinke lieber Tee = I prefer to
+drink tea); **am liebsten** = "like most of all" (Am liebsten spiele ich
+Tennis = my favorite thing to do is play tennis).
+
+## Exercise summary
+
+1. **K1 Wie ist …?** — build 10 sentences matching a picture to the
+   correct descriptive adjective.
+2. **K2 Rap gefällt mir besser!** — complete 9 dialogues choosing the
+   correct comparative/superlative form of gut/viel/gern.
+
+## Answer key highlights
+
+- K1: ist verheiratet; ist krank; ist groß; ist klein; ist nett; ist
+  breit; ist neu; sind teuer; ist schwer; ist leicht (matching the
+  picture order 1–10; note the adjective pool has 10 items for 10
+  blanks, one-to-one).
+- K2: lieber; besser; lieber/besser; mehr/am meisten; am besten; lieber;
+  am liebsten; am besten; mehr.
+
+## Notes / gotchas
+
+- **K2 is new grammar** — comparison (Komparativ/Superlativ) isn't part
+  of Menschen A1.1 at all, so present this as a bonus topic rather than
+  review. It's genuinely useful vocabulary (gern/lieber/am liebsten is
+  extremely common in everyday speech) even though it's technically
+  beyond the curriculum.
+- **gern is an adverb, not an adjective** — "Ich spiele gern Tennis" (I
+  like playing tennis), not describing a noun. Worth distinguishing from
+  gut/viel, which behave more like typical adjectives.
+- **This is the shortest section in the book so far (2 sub-exercises,
+  2 pages)** — good candidate to pair with a quick review of Section J
+  or a light practice session rather than a standalone session.