I created form view for school.student model 

i putted subjects field in the bottom of the form view but it is showen in the top of the form

Why??

this is thcode of student form view:

id="school_student_view_form" model="ir.ui.view">
    name="name">school.student.view.form
    name="model">school.student
    name="arch" type="xml">
        string="Student">
            
                
                    
                        name="name"/>
                        name="class_id"/>
                        name="division"/>
                        name="address"/>
                    
                    
                        name="birth_date"/>
                        name="age"/>
                        name="date"/>
                        name="officer"/>
                        name="subjects"/>
                    
                
            
        
    

this is the code of school.student model:

class school_student(models.Model):
    _name='school.student'
    name=fields.Many2one('res.partner',string='Student Name')
    subjects=fields.Many2many('school.subject',string="Subjects")
    class_id=fields.Integer(string="Class ID")
    address=fields.Char(string="Address")
    division=fields.Char(string="Division")
    birth_date=fields.Date(string="Birth Date")
    age=fields.Integer(string="Age",compute='_compute_age')
    date=fields.Date()
    officer=fields.Many2one('res.users')

this the screen of the output: