diff --git a/docs/core_abstraction.md b/docs/core_abstraction.md
index 5ef824b..6043574 100644
--- a/docs/core_abstraction.md
+++ b/docs/core_abstraction.md
@@ -1,14 +1,6 @@
 ---
 layout: default
 title: "Core Abstraction"
-nav_order: 3
+nav_order: 2
 has_children: true
----
-
-## Core Abstraction
-
-- [Node](./node.md)
-- [Flow](./flow.md)
-- [Communication](./communication.md)
-- [Batch](./batch.md)
-- [Async](./async.md)
+---
\ No newline at end of file
diff --git a/docs/index.md b/docs/index.md
index a6b8913..d0fdd95 100644
--- a/docs/index.md
+++ b/docs/index.md
@@ -20,11 +20,6 @@ We model the LLM workflow as a **Nested Flow**:
   <img src="https://github.com/zachary62/miniLLMFlow/blob/main/assets/minillmflow.jpg?raw=true" width="400"/>
 </div>
 
-## Preparation
-
-- [LLM Integration](./llm.md)
-- [Tools](./tool.md)
-
 ## Core Abstraction
 
 - [Node](./node.md)
@@ -33,6 +28,11 @@ We model the LLM workflow as a **Nested Flow**:
 - [Batch](./batch.md)
 - [Async](./async.md)
 
+## Preparation
+
+- [LLM Integration](./llm.md)
+- Tools
+
 ## Paradigm Implementation
 
 - Task Decomposition
diff --git a/docs/llm.md b/docs/llm.md
index c76c89e..fa5fa98 100644
--- a/docs/llm.md
+++ b/docs/llm.md
@@ -1,7 +1,8 @@
 ---
 layout: default
 title: "LLM Integration"
-nav_order: 2
+parent: "Preparation"
+nav_order: 1
 ---
 
 # LLM Wrappers  
diff --git a/docs/preparation.md b/docs/preparation.md
new file mode 100644
index 0000000..9e8cbf9
--- /dev/null
+++ b/docs/preparation.md
@@ -0,0 +1,6 @@
+---
+layout: default
+title: "Preparation"
+nav_order: 3
+has_children: true
+---
\ No newline at end of file