anchor.diff:  <div class="row" style="margin:50px">
     <span class="span12">
       <div class="text-center">
  -      <h1>Learning Tools Interoperability</h1>
  +      <h1>Learning Tools Advantage</h1>
       </div><br>
       <p>
         Learning Tools Interoperability is a specification
  
positive.code:       that they can embed into their course. <%= link_to "Click here",
        lti_path %> to read more about LTI.
      </p>
      <h3>LTI Advantage</h3>
      <p>
        LTI Advantage is next step towards interoperability and is a package of
        extensions that enable deeper integration of tools with LMS. These
        extensions are built on the core LTI standard (v1.1 or higher).
        Currently, there are following three LTI Advantage extensions:
      </p>
      <p>
        <strong>Names and Role Provisioning Services:</strong> This extension
        enables LMS to send list of course participants and faculty defined
        groups to learning tools. It also allows to learn who has not yet
        accessed a tool. It is a new name of Membership Service.
      </p>
      <p>
        <strong>Deep Linking:</strong> Provides a more intuitive way to add
        content from a tool provider by providing support for various types of
        content items such as a playlists, hyperlink, iframe or a file. It is the
        new name for Content Item Message.
      </p>
      <p>
        <strong>Assignment and Grade Services:</strong> Enables tools to pass
        results of assignment back to the LMS. Along with the scores, it also
        supports comments to be returned to LMS if provided. It enables
        instructors to maintain grades and comments in one a single place (LMS
        grade book). It is the new name for Gradebook Service.
      </p>
      <br>
      Following is a detailed explanation of each of these extensions with
      examples taken from IMS website.
      <br>
      <h3>Names and Role Provisioning Services</h3>
      <p>
        The Names and Role Provisioning Services provides access to data about
        users' roles within a course for example a list of enrollments in a
        course. It automates course enrollment in tool providers and enables
        instructors to receive reporting on student activity within a learning
        tool, such as the list of users and their roles or a list of participants
        who have not accessed the course yet. LTI does not pass user information
        in its default configuration and Names and Role Provisioning Services
        automates the provision of student lists to an external tool. Sending the
        list of students enables external tool to pre-provision accounts for all
        users rather than creating one when student launches for the first time.
      </p>
      <p>
        In order for a tool to be able to use this service, in LTI 1.x, the tool
        consumers have to pass an endpoint as a custom parameter with the name of
        <strong>custom_context_memberships_url</strong>. To implement Names and
        Role Provisioning Services, a TP only needs to send a signed GET request
        to this endpoint and in return TP will receive a membership list.
      </p>
  
      <p>
  
negative.code:     <strong>content_item_return_url=</strong> [URL] (Required) <br>
      <p>
        This field contains a URL where Tool Provider redirects the user back to
        the Tool Consumer.
      </p>
  
      <strong>accept_unsigned=</strong> false | true (Optional)
      <br>
      <p>
        This field indicates whether the the Tool Consumer accepts an unsigned
        return message or not.
      </p>
  
      <strong>accept_multiple=</strong> false | true (Optional)
      <br>
      <p>
        accept_multiple indicates if user can select multiple content items or not.
      </p>
  
      <strong>accept_copy_advice=</strong> false | true (Optional)
      <br>
      <p>
        This field indicates if the Tool Consumer will make a local copy of a
        content item. Tool Providers can send <em>expiresAt</em> parameter to let
        the Tool Consumer know that the item will expire on that date.
      </p>
  
      <strong>accept_unsigned=</strong> false | true (Optional)
  