diff --git a/.idea/.gitignore b/.idea/.gitignore
new file mode 100644
index 0000000..26d3352
--- /dev/null
+++ b/.idea/.gitignore
@@ -0,0 +1,3 @@
+# Default ignored files
+/shelf/
+/workspace.xml
diff --git a/.idea/bebras-pandai.iml b/.idea/bebras-pandai.iml
new file mode 100644
index 0000000..d6ebd48
--- /dev/null
+++ b/.idea/bebras-pandai.iml
@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$" />
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file
diff --git a/.idea/modules.xml b/.idea/modules.xml
new file mode 100644
index 0000000..2604166
--- /dev/null
+++ b/.idea/modules.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/bebras-pandai.iml" filepath="$PROJECT_DIR$/.idea/bebras-pandai.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/vcs.xml b/.idea/vcs.xml
new file mode 100644
index 0000000..35eb1dd
--- /dev/null
+++ b/.idea/vcs.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="" vcs="Git" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/app/lib/features/quiz_exercise/presentation/model/answer.dart b/app/lib/features/quiz_exercise/presentation/model/answer.dart
new file mode 100644
index 0000000..b924da4
--- /dev/null
+++ b/app/lib/features/quiz_exercise/presentation/model/answer.dart
@@ -0,0 +1,23 @@
+import 'aspect.dart';
+import 'explanation.dart';
+
+class Answer {
+  final Aspect aspect;
+  final List<dynamic> correctAnswer;
+  final Explanation explanation;
+
+  Answer({
+    required this.aspect,
+    required this.correctAnswer,
+    required this.explanation,
+  });
+
+  factory Answer.fromJson(Map<String, dynamic> json) {
+    return Answer(
+        aspect: Aspect.fromJson(json['aspect'] as Map<String, dynamic>),
+        correctAnswer:
+            json['correctAnswer'].cast<Map<String, dynamic>>() as List<dynamic>,
+        explanation:
+            Explanation.fromJson(json['explanation'] as Map<String, dynamic>));
+  }
+}
diff --git a/app/lib/features/quiz_exercise/presentation/model/aspect.dart b/app/lib/features/quiz_exercise/presentation/model/aspect.dart
new file mode 100644
index 0000000..ca3b765
--- /dev/null
+++ b/app/lib/features/quiz_exercise/presentation/model/aspect.dart
@@ -0,0 +1,12 @@
+class Aspect {
+  final String content;
+  final String label;
+  Aspect({required this.content, required this.label});
+
+  factory Aspect.fromJson(Map<String, dynamic> json) {
+    return Aspect(
+      content: json['content'] as String,
+      label: json['label'] as String,
+    );
+  }
+}
diff --git a/app/lib/features/quiz_exercise/presentation/model/description.dart b/app/lib/features/quiz_exercise/presentation/model/description.dart
new file mode 100644
index 0000000..e3a2980
--- /dev/null
+++ b/app/lib/features/quiz_exercise/presentation/model/description.dart
@@ -0,0 +1,8 @@
+class Description {
+  final String content;
+  Description({required this.content});
+
+  factory Description.fromJson(Map<String, dynamic> json) {
+    return Description(content: json['content'] as String);
+  }
+}
diff --git a/app/lib/features/quiz_exercise/presentation/model/explanation.dart b/app/lib/features/quiz_exercise/presentation/model/explanation.dart
new file mode 100644
index 0000000..3e09924
--- /dev/null
+++ b/app/lib/features/quiz_exercise/presentation/model/explanation.dart
@@ -0,0 +1,11 @@
+class Explanation {
+  final String content;
+
+  Explanation({required this.content});
+
+  factory Explanation.fromJson(Map<String, dynamic> json) {
+    return Explanation(
+      content: json['content'] as String,
+    );
+  }
+}
diff --git a/app/lib/features/quiz_exercise/presentation/model/options.dart b/app/lib/features/quiz_exercise/presentation/model/options.dart
new file mode 100644
index 0000000..3bd87c2
--- /dev/null
+++ b/app/lib/features/quiz_exercise/presentation/model/options.dart
@@ -0,0 +1,12 @@
+class Options {
+  final String content;
+  final String id;
+  Options({required this.content, required this.id});
+
+  factory Options.fromJson(Map<String, dynamic> json) {
+    return Options(
+      content: json['content'] as String,
+      id: json['id'] as String,
+    );
+  }
+}
diff --git a/app/lib/features/quiz_exercise/presentation/model/questions.dart b/app/lib/features/quiz_exercise/presentation/model/questions.dart
new file mode 100644
index 0000000..56b4640
--- /dev/null
+++ b/app/lib/features/quiz_exercise/presentation/model/questions.dart
@@ -0,0 +1,15 @@
+import 'options.dart';
+
+class Question {
+  final String content;
+  final List<Options> options;
+
+  Question({required this.content, required this.options});
+
+  factory Question.fromJson(Map<String, dynamic> json) {
+    return Question(
+      content: json['content'] as String,
+      options: json['options'].cast<Map<String, dynamic>>() as List<Options>,
+    );
+  }
+}
diff --git a/app/lib/features/quiz_exercise/presentation/model/quiz_exercise.dart b/app/lib/features/quiz_exercise/presentation/model/quiz_exercise.dart
new file mode 100644
index 0000000..8c00fc1
--- /dev/null
+++ b/app/lib/features/quiz_exercise/presentation/model/quiz_exercise.dart
@@ -0,0 +1,38 @@
+import 'description.dart';
+import 'questions.dart';
+
+class QuizExerciseModel {
+  final String id;
+  final String country;
+  final String challengeGroup;
+  final String title;
+  final String type;
+  final String source;
+  final Description description;
+  final Question question;
+
+  QuizExerciseModel({
+    required this.id,
+    required this.country,
+    required this.challengeGroup,
+    required this.title,
+    required this.source,
+    required this.type,
+    required this.description,
+    required this.question,
+  });
+
+  factory QuizExerciseModel.fromJson(Map<String, dynamic> json) {
+    return QuizExerciseModel(
+      id: json['id'] as String,
+      country: json['country'] as String,
+      challengeGroup: json['challenge_group'] as String,
+      title: json['title'] as String,
+      source: json['source'] as String,
+      type: json['type'] as String,
+      description:
+          Description.fromJson(json['description'] as Map<String, dynamic>),
+      question: Question.fromJson(json['question'] as Map<String, dynamic>),
+    );
+  }
+}
diff --git a/app/lib/features/quiz_exercise/presentation/repositories/quiz_exercise.dart b/app/lib/features/quiz_exercise/presentation/repositories/quiz_exercise.dart
new file mode 100644
index 0000000..8b13789
--- /dev/null
+++ b/app/lib/features/quiz_exercise/presentation/repositories/quiz_exercise.dart
@@ -0,0 +1 @@
+