diff --git a/001_documentation/Requirements/REQ0006/schema.dbml b/001_documentation/Requirements/REQ0006/schema.dbml
index 1d0dff1..7d0409e 100644
--- a/001_documentation/Requirements/REQ0006/schema.dbml
+++ b/001_documentation/Requirements/REQ0006/schema.dbml
@@ -1,4 +1,5 @@
 // LessonTypes stores different types of lessons
+// lesson_types, lesson_type
 Table LessonTypes {
   // system field
   id int [pk, increment] // unique identifier for the lesson type
@@ -10,6 +11,7 @@ Table LessonTypes {
 }
 
 // LessonCategories stores categories of lessons
+// lesson_categories, lesson_category
 Table LessonCategories {
   // system field
   id int [pk, increment] // unique identifier for the lesson category
@@ -133,5 +135,81 @@ Table Vocabularies {
   sample_c varchar // Sample sentence in Chinese using the word
   cat_id integer [ref: > LessonCategories.id] // foreign key referring to LessonCategories.id
   category varchar // The category to which the lesson belongs
+  lesson_type_id integer [ref: > LessonTypes.id] // foreign key referring to LessonTypes.id
 }
 
+// Listening Practice Quiz Categories
+// store listening practice category, (LpCategories, LpCategory)
+Table QuizLPCategories {
+  // system fields
+  id text [pk] // changed from int to text to match PocketBase
+  created datetime [default: `now()`]
+  updated datetime
+
+  // value fields
+  cat_name varchar [presentable: true] // added presentable flag
+  cat_image file // changed from blob to file type
+  pos number // changed from integer to number
+  init_answer json
+}
+
+// Listening Practice Quiz Questions
+Table QuizLPQuestions {
+  id int [pk, increment]
+  created datetime [default: `now()`]
+  updated datetime
+  word varchar
+  sound blob
+  cat_id integer [ref: > QuizLPCategories.id]
+}
+
+// Matching Frenzy Quiz Categories
+Table QuizMFCategories {
+  id int [pk, increment]
+  created datetime [default: `now()`]
+  updated datetime
+  cat_name varchar
+  cat_image blob
+  pos integer
+  init_answer json
+}
+
+// Matching Frenzy Quiz Questions
+Table QuizMFQuestions {
+  id int [pk, increment]
+  created datetime [default: `now()`]
+  updated datetime
+  word varchar
+  word_c varchar
+  cat_id integer [ref: > QuizMFCategories.id]
+}
+
+// Connectives Revision Quiz Categories
+Table QuizCRCategories {
+  id int [pk, increment]
+  created datetime [default: `now()`]
+  updated datetime
+  cat_name varchar
+  cat_image blob
+  pos integer
+  init_answer json
+}
+
+// Connectives Revision Quiz Questions
+Table QuizCRQuestions {
+  id int [pk, increment]
+  created datetime [default: `now()`]
+  updated datetime
+  question_fh varchar
+  question_sh varchar
+  modal_ans varchar
+  cat_id integer [ref: > QuizCRCategories.id]
+}
+
+// Test table
+Table t1 {
+  id int [pk, increment]
+  created datetime [default: `now()`]
+  updated datetime
+  name varchar
+}