How to handle multiple layout in Rails

we have lots of panel in out Application like admin , teacher principal , student , parent etc .

Each panel have its own layout So upon login we handle this using WelcomeController

class WelcomeController < ApplicationController
  def index
    respond_to do |format|
      format.html do
        return render :home if current_user.nil?
        return render :admin if current_user.super?
        return redirect_to("/student/lesson") if current_user.student?
        return redirect_to("/teacher/lesson") if current_user.teacher?
        return render "layouts/principal" if current_user.principal?
        return render "layouts/coordinator" if current_user.coordinator?
        return render "layouts/viceprincipal" if current_user.viceprincipal?
        return render "layouts/parent" if current_user.parent?
      end
    end
  end
end

So right now for getting data from controller we redirect to his route Like for Student

return redirect_to("/student/lesson") if current_user.student?

but we wants that on URL / we get data from controller . So my problem is how to get data ? So we can use in views

I am new to Rails , if I am using something wrong Please let me know . Will I get data from Model ?

In routes we use

get '/student/lesson', to: 'student_lesson_plan#index', as: 'student_lesson'

And from index Action we have variables which we use . So I want instead of

return redirect_to("/student/lesson") if current_user.student? something like this

return render "layouts/student" if current_user.student?

And I can use those variables which I initialize in student_lesson_plan#index or from another place