diff --git a/备课组/26届/校本材料.json b/备课组/26届/校本材料.json
index a2848a83..dfadc20d 100644
--- a/备课组/26届/校本材料.json
+++ b/备课组/26届/校本材料.json
@@ -4066,6 +4066,56 @@
                 "021798"
             ],
             "remarks": ""
+        },
+        "G20260231": {
+            "id": "G20260231",
+            "name": "向量数量积与夹角的坐标表示",
+            "filename": "向量数量积与夹角的坐标表示",
+            "objects": [
+                "K0508001B",
+                "K0508002B",
+                "K0508003B",
+                "K0508004B",
+                "K0508005B",
+                "K0508006B"
+            ],
+            "basicknowledges": [
+                "B00208",
+                "B00209",
+                "B00210"
+            ],
+            "examples_basic": [
+                "018505",
+                "018506",
+                "018507",
+                "018508",
+                "018509"
+            ],
+            "work_inclass": [
+                "009634",
+                "009635",
+                "009636",
+                "009637"
+            ],
+            "homework": [
+                "021800",
+                "021801",
+                "021802",
+                "021803",
+                "021804",
+                "021805",
+                "021806",
+                "021807",
+                "021808",
+                "021809",
+                "021810",
+                "021811",
+                "021812",
+                "021813",
+                "021814",
+                "021819"
+            ],
+            "remarks": ""
         }
     }
 }
\ No newline at end of file