diff --git a/academy_management/__manifest__.py b/academy_management/__manifest__.py
index f8090a4..d5bff96 100644
--- a/academy_management/__manifest__.py
+++ b/academy_management/__manifest__.py
@@ -23,6 +23,7 @@ Academy Management
     # always loaded
     'data': [
         'security/ir.model.access.csv',
+        'data/ir_sequence_data.xml',
         'views/academy_course_views.xml',
         'views/academy_schedule_views.xml',
         'views/academy_student_views.xml',
diff --git a/academy_management/data/ir_sequence_data.xml b/academy_management/data/ir_sequence_data.xml
new file mode 100644
index 0000000..637adb8
--- /dev/null
+++ b/academy_management/data/ir_sequence_data.xml
@@ -0,0 +1,31 @@
+<?xml version="1.0" encoding="utf-8"?>
+<odoo noupdate="1">
+
+    <record id="sequence_course_code" model="ir.sequence">
+        <field name="name">Academy Course Code</field>
+        <field name="code">academy.course</field>
+        <field name="prefix">CNTT</field>
+        <field name="padding">3</field>
+        <field name="number_next">1</field>
+        <field name="number_increment">1</field>
+    </record>
+
+    <record id="sequence_student_code" model="ir.sequence">
+        <field name="name">Academy Student Code</field>
+        <field name="code">academy.student</field>
+        <field name="prefix">SV</field>
+        <field name="padding">3</field>
+        <field name="number_next">1</field>
+        <field name="number_increment">1</field>
+    </record>
+
+     <record id="sequence_teacher_code" model="ir.sequence">
+        <field name="name">Academy Teacher Code</field>
+        <field name="code">academy.teacher</field>
+        <field name="prefix">GV</field>
+        <field name="padding">3</field>
+        <field name="number_next">1</field>
+        <field name="number_increment">1</field>
+    </record>
+
+</odoo>
\ No newline at end of file
diff --git a/academy_management/models/academy_course.py b/academy_management/models/academy_course.py
index 02982e9..9107c30 100644
--- a/academy_management/models/academy_course.py
+++ b/academy_management/models/academy_course.py
@@ -5,6 +5,19 @@ class AcademyCourse(models.Model):
     _description = 'Academy Course'
 
     name = fields.Char(string='Tên khóa học', required=True)
-    code = fields.Char(string='Mã khóa học', required=True)
+    code = fields.Char(string='Mã khóa học', required=True, copy=False, readonly=True, default=lambda self: _(' '))
     description = fields.Text(string='Mô tả khóa học')
-    student_ids = fields.Many2many('academy.student', string='Học viên đăng ký khóa học')
\ No newline at end of file
+    student_ids = fields.Many2many('academy.student', string='Học viên đăng ký khóa học')
+
+    _sql_constraints = [(
+        'code_unique',
+        'unique(code)',
+        'Mã khóa học phải là duy nhất!'
+    )]
+
+    @api.model_create_multi
+    def create(self, vals_list):
+        for vals in vals_list:
+            if vals.get('code', _(' ')) == _(' '):
+                vals['code'] = self.env['ir.sequence'].next_by_code('academy.course') or 'CNTT001'
+        return super(AcademyCourse, self).create(vals_list)
\ No newline at end of file
diff --git a/academy_management/models/academy_student.py b/academy_management/models/academy_student.py
index 8099d2b..4dbc704 100644
--- a/academy_management/models/academy_student.py
+++ b/academy_management/models/academy_student.py
@@ -5,8 +5,21 @@ class AcademyStudent(models.Model):
     _description = 'Academy Student'
 
     name = fields.Char(string='Tên học sinh', required=True)
-    code = fields.Char(string='Mã học sinh', required=True)
+    code = fields.Char(string='Mã học sinh', required=True, copy=False, readonly=True, default=lambda self: _(' '))
     birth_date = fields.Date(string='Ngày sinh')
     email = fields.Char(string='Email')
     phone = fields.Char(string='Số điện thoại')
-    course_ids = fields.Many2many('academy.course', string='Các khóa học học sinh đăng ký')
\ No newline at end of file
+    course_ids = fields.Many2many('academy.course', string='Các khóa học học sinh đăng ký')
+
+    _sql_constraints = [(
+        'code_unique',
+        'unique(code)',
+        'Mã học sinh phải là duy nhất!'
+    )]
+
+    @api.model_create_multi
+    def create(self, vals_list):
+        for vals in vals_list:
+            if vals.get('code', _(' ')) == _(' '):
+                vals['code'] = self.env['ir.sequence'].next_by_code('academy.student') or 'HS001'
+        return super().create(vals_list)
\ No newline at end of file
diff --git a/academy_management/models/academy_teacher.py b/academy_management/models/academy_teacher.py
index ccf1286..25d6d1a 100644
--- a/academy_management/models/academy_teacher.py
+++ b/academy_management/models/academy_teacher.py
@@ -5,7 +5,20 @@ class AcademyTeacher(models.Model):
     _description = 'Academy Teacher'
 
     name = fields.Char(string='Tên giáo viên', required=True)
-    code = fields.Char(string='Mã giáo viên', required=True)
+    code = fields.Char(string='Mã giáo viên', required=True, copy=False, readonly=True, default=lambda self: _(' '))
     email = fields.Char(string='Email')
     phone = fields.Char(string='Số điện thoại')
-    course_ids = fields.Many2many('academy.course', string='Các khóa học giảng dạy')
\ No newline at end of file
+    course_ids = fields.Many2many('academy.course', string='Các khóa học giảng dạy')
+
+    _sql_constraints = [(
+        'code_unique',
+        'unique(code)',
+        'Mã giáo viên phải là duy nhất!'
+    )]
+
+    @api.model_create_multi
+    def create(self, vals_list):
+        for vals in vals_list:
+            if vals.get('code', _(' ')) == _(' '):
+                vals['code'] = self.env['ir.sequence'].next_by_code('academy.teacher') or 'GV001'
+        return super().create(vals_list)
\ No newline at end of file
diff --git a/academy_management/security/academy_security.xml b/academy_management/security/academy_security.xml
new file mode 100644
index 0000000..79a45c5
--- /dev/null
+++ b/academy_management/security/academy_security.xml
@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+
+    <data noupdate="0">
+        <record id="module_category_academy" model="ir.module.category">
+            <field name="name">Academy Management</field>
+        </record>
+
+        <record id="group_academy_staff" model="res.groups">
+            <field name="name">Academy Staff</field>
+            <field name="category_id" ref="academy_management.module_category_academy"/>
+            <field name="implied_ids" eval="[(4, ref('base.group_user'))]" />
+            <field name="comment">this user can only see the list of students but not edited.</field>
+        </record>
+
+        <record id="group_academy_admin" model="res.groups">
+            <field name="name">Academy Admin</field>
+            <field name="category_id" ref="academy_management.module_category_academy"/>
+            <field name="implied_ids" eval="[(4, ref('academy_management.group_academy_staff'))]" />
+            <field name="comment">this user have the right to manage students, lecturers, courses.</field>
+        </record>
+    </data>
+
+</odoo>
\ No newline at end of file
diff --git a/academy_management/views/academy_course_views.xml b/academy_management/views/academy_course_views.xml
index 29aaaf4..0be18cb 100644
--- a/academy_management/views/academy_course_views.xml
+++ b/academy_management/views/academy_course_views.xml
@@ -9,7 +9,7 @@
                 <sheet>
                     <group>
                         <field name="name" />
-                        <field name="teacher_id" />
+                        <field name="code" />
                         <field name="student_ids" widget="many2many_tags" />
                         <field name="description" />
                     </group>
@@ -25,7 +25,6 @@
             <list string="">
                 <field name="name" />
                 <field name="code" />
-                <field name="teacher_id" />
                 <field name="student_ids" widget="many2many_tags" />
             </list>
         </field>