Issue with rendering data to another page

HI,

          I am new to cakephp framework.I am using cakephp 2.5.2 version.I am trying to develop Content Management System. I used baking concept and it generated pages.My pages are Grades,subjects,Chapters,Quizzes,Questions and options. For every grade there are so many subjects and for every subject there are so many chapters and for every chapter there are so many Quizzes like that. Now my requirement is after creating grades(once the grade is saved) it should redirect to subjects page(in subject add page) with the grade name.I used the following code in gradescontroller 

return $this->redirect(array('controller' => 'subjects', 'action' => 'add'));

By using the above code i am just redirecting to  add page in subjects model but i am unable to get grade name in subjects model(add page).

Please Help me

Thanks in advance.

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