Update index.html

Author: Gmac4247

index.html

@@ -198,7 +198,7 @@
 },
 "dateCreated" :"2019-01-11",
 "datePublished":"2020-01-11",
-"dateModified" :"2025-08-10",
+"dateModified" :"2025-08-11",
 "description" : "Introducing the best-established and most accurate framework to calculate area and volume.",
 "disambiguatingDescription": "Exact, empirically grounded and rigorously proven formulas over the conventional approximations.",
 "headline":"Introducing the Core Geometric System ™",
@@ -320,7 +320,7 @@
 	"target": "https://basic-geometry.github.io",
      "mathExpression-input": "required cap_radius=5_height=3_Volume=?",
      "mathExpression-output": "1.6 * radius^2 * sqrt(3.2) * height", 
-    "educationalLevel": "medium",
+    "educationalLevel": "advanced",
 	"image": "sphericalCap.jpg",
      "eduQuestionType": "Volume calculation"
   },