forms - Variable won't pass over as an argument in AngularJS -

i new angularjs, , have come on issue passing variables function in controller. here code in html page:

<li ng-repeat="grade in grades">    <span class="status-{{grade.status()}}" ng-hide="visible" focus="visible = true" blur="visible = false" ng-click="visible = true">{{grade.name}},</span>      <span class="status-{{grade.status()}}" ng-hide="visible" focus="visible = true" blur="visible = false" ng-click="visible = true">{{grade.score}}</span>    <form ng-model="studentupdform" ng-submit="update({{grade.name}}, {{studentnamenew}}, {{grade.score}}, {{studentgradenew}})" focus="visible = true" blur="visible = false" ng-show="visible">          <input type="text" ng-model="studentnamenew" size="12" class="status-{{grade.status()}}" placeholder="{{grade.name}}" value="{{grade.name}}">,           <input type="text" ng-model="studentgradenew" size="2" class="status-{{grade.status()}}" placeholder="{{grade.score}}" value="{{grade.score}}">                                                    <input class="btn-primary" type="submit" value="update">     </form> </li> 

here function form points to:

$scope.update = function(thisname, newname, thisscore, newscore) {      //run code }; 

what it's supposed do: allow inline editing of list item, generated array "grades", each item being "grade". here's i'm running trouble: in calling function $scope.update, values thisscore , newscore passed in fine variables {{grade.score}} , {{studentgradenew}}. however, values i've trying pass through thisname , newname not. when send arguments passed in console, this:

undefined undefined 98 88  

i've been digging around see why old , new names not passing over, @ loss. it's odd me since old , new score variables passing successfully, , declared in relation form same way names. must missing something, can't think of what.

try removing {{}} in function call. aren't required. not sure why still find of vars , not others, in plunker when removed them, things started working.