def base_resources val, scope, args={}
  begin
    "#{scope.camelcase}::StudentsController".constantize
    resources val.to_sym, args.merge(controller: "#{scope}::#{val}")
  rescue
    resources val.to_sym, args.merge(controller: "base::#{val}")
  end
end

%w[math english].each do |subject|
  scope "/#{subject}" do
    base_resources "students", subject, only: :index
  end
end