OLAS/app/models/Student.php

<?php

class Student extends Eloquent
{
  protected $fillable = array('name', 'number', 'email', 'school_code', 'conc_code');

  public function courses()
  {
    return $this->belongsToMany('Course')->withTimestamps();
  }

  public function program()
  {
    return $this->belongsTo('Program');
  }

  public function assessed_activities()
  {
  	return $this->belongsToMany('Activity', 'assessments')->withPivot('scores', 'percentage')->withTimestamps();
  }
}