jQuery draggable selector not working -

i want drag , drop specifies elements draggable selector not working well.

        $("#lessonteacher p").draggable({                 revert: true,                 helper: 'clone',                 containment: "#timetable"         }); 

in lessonteacher div has many 'p' html tags. , want drag 'p' items. code didn't work.

try

  <div id="draggable" class="ui-widget-content">         <p>drag me around</p>     </div>      $( "#draggable" ).draggable();