Trifork Learning Solutions

Brand New and Stronger
only for Assessment Experts
QTI Player V.3.6.5


We believe in assessment delivery technology that inspires and realizes the full potential of users...
…to drive a fair era of personal development, growth, and productivity.


We join forces with our partner-clients. Combine both strengths using Open Standards and adding extreme customization. Goal: getting best of breed


We deliver interoperable software. Technology to…

  1. Deliver your assessments
  2. Lockdown your client devices
  3. Monitor your candidates


QTI Assessment Player

An assessment delivery engine to administer low- and high-stakes assessments. Available in three applications:

The QTI Assessment player is a Java web applications provided in war packaging.

It is possible to show the same assessment in different styles and lay-outs
Supported browsers
Safari,Chrome, IE9 and above, Firefox. The player renders the QTI to an actual assessment that humans can see in a browser.
Responsive design
Screen resolutions of candidates may differ. Ideally you want the assessment to render correctly on all resolutions
Session API
In order to do a test a certain person has to be combined with a certain test for a certain time period. This is called a session. The player has an API to create these sessions from for example, your student management system.
Audio/video test
Assesssments may contain audio and video files. In order to be sure that these files will be played successfully on the candidate’s computer the player has an audio and video check before the actual assessment starts. The tests are conditional when the assessment does not have a video fragment in it the Video test is skipped.
Interaction type
QTI specifies different interaction types. Basically interaction types are high-level representations of question types. One interaction type can represent different question types depending on the visual representation
Choice Interaction
Multiple choice with text or images or both Multi select with text or images or both
Match Interaction
Choice matrix
Text entry interaction
Fill in the blanks
Inline Choice Interaction
Fill in the blanks drop down
Gap match Interaction
Fill in the blanks drag and drop
Graphic gap Match Interaction
Fill in the blanks drag and drop images
Order Interaction
Order images text or both
Hot text interaction
Text hotspot, select sentences words or paragraphs in a text
Hot spot Interaction
Image hotspot, select hotspots on an image
Position Object interaction
Place 1 or more objects on a canvas
Select point interaction
Select 1 or more points on a canvas
Graphic order interaction
Decide order of hotpsots on a image
Graphic associate Interaction
Connect hotspots on a image
Slider Interaction
Set a value by moving a slider
Media Interaction
Determine min and max number of plays for audio or media file. Determine how many times an audio or media file is played.
Time based assessment, test-part and item
It is possible to set a maximum time on a assessment an item and a testpart.An item is what is shown in one screen. Normally this is called a question, although more questions can be shown in one screen. Every item has a number to represent it in the navigation A test-part is a collection of questions that has to be closed at the end. When closed it can not be opened again. An assessment must contain at least one test-part but can contain more.
Custom expressions
To make the processing of the input of the candidate easier.Trim –removes whitespaces, Decimal notation – changes localized to uniform notation, Diacritcs – changes diacritics to charactrer without diacritic
There are several tools available in the player. You can use the QTI to decide if and where a certain tool is available
Linear navigation
The player offers a navigation that allows you to only move forward through the assessment
Non-linear navigation
The player offers a navigation that allows you to move freely through the assessment
Show answered state
The player can show which questions are answered and which are not
Overview screen
The player can show an overview that can show all the questions in the test-part, the answered state and the marked state. It can also be used to navigate
Adaptive testing
The player can handle adaptive testing. An adaptive assessment has an algorithm that selects the next item to show to the candidate based on the answers the candidate has given.
Test results
The player can show a result screen after submitting the assessment. Different ways of showing the results are possible The amount of time that the results are shown can also be set
Event logging
Many interactions between the player and the candidate can be logged. The following events can be logged:Navigation changes, Answers, Session started / ended, Item / Assessment imported
To prevent more than one browser showing the same session we use secure cookies HMAC and we are OWASP compliand

Lockdown client

This is an extention to the Assessment Delivery Engine. The process of securing an endpoint. The candidate can only access authorised features. An example of this would be turning the device into a 'Thin Client' by locking it down so that an end user can only connect to predefined applications, like taking the assessment only.

Session monitor

A Front-end application to monitor candidate's assessment progress. It is used in test centers or at test location. It provides the supervisor - for example - an overview about:

There is an option for the supervisor to intervene and pauze, re-start or hand-in the test per seat/candidate.


Centraal Bureau voor Rijbewijzen

Centraal Bureau voor Rijbewijzen

The Central Office for Driver licenses (Dutch: Centraal Bureau voor Rijbewijzen (CBR)) is the organization appointed by the department of infrastructure that assesses driving skills and medical fitness of drivers (car, truck, boat, and plane).

The CBR has 5 offices, 55 practical exam locations and 30 theoretical exam locations. In total 1.500.000 exams are held each year; 800.000 are theoretical exams.

The main part of these theoretical exams are audio-visual and collective which are held on a certain time on a certain location. All candidates are exposed to yes/no questions referring to a series of slides and videos.

Business challenge

In view of the current individualization of our society CBR wanted to change the current process of registering, planning and taking of all 800.000 theoretical exams. Instead of the collective exams it should be possible to take an exam individually whenever a candidate wishes to. Reasons are:

Efficiency: candidates can work in their own tempo and finish exams faster than they would in a group; Fraud prevention: individual exams make different versions of the same exam possible and cheating virtually impossible; Service: candidates can take an exam on a date and at a time they prefer.

Project outline

The new assessment platform for CBR allows to take an exam individually and at a preferred moment. It includes features such as a calculator, reference tool and a time-based functionality (complete the exam in a certain time).

The new system is based on Trifork’s QTI (Question Test Interoperability) Assessment Delivery Engine, using a world-wide Open Standard. The client lockdown allows secure, high-stake digital assessments by making it impossible to start up other applications or browse on the internet while taking a test and therefore prevent from fraud. The whole system is completely touch based (including a touch(on)screen keyboard) and displayed on a high resolution touchscreen.

Trifork also integrated a text-to-speech functionality for candidates with reading difficulties. And on top of that Trifork delivered an on-premise proctoring exam monitor which helps supervisors to manage the active exam sessions on a certain location (who is taking which exam, how much time is spent and left, how many questions are answered and left). Furthermore the supervisor can pause and abort individual exams or all the exams that are active on a location.


This project was a European tender, fixed price and fixed date. Not all requirements specified in the tender where implemented in the end because new requirements popped up during implementation. Because Trifork used an agile approach the product owner had the freedom to decide every sprint which functionality was implemented. Since the project was fixed price this meant that the product owner had to exchange functionality when out-of-scope functionality was added to a sprint.


CBR has done a major overhaul of their process. The center piece is Trifork’s QTI Assessment Delivery Engine. Another major part of the process supervising the exam is also supported by software created by Trifork, the exam monitor.

Bildungsraum Nordwestschweiz

Bildungsraum Nordwestschweiz

Four Swiss cantons of Aargau, Basel-Landschaft, Basel-Stadt and Solothurn (Bildungsraum Nordwestschweiz) have set themselves a formidable goal to improve their educational system within the upcoming years.

For this major challenge the Institut for Bildungsevaluation, University of Zurich (IBE) and the Dutch assessment institute Cito were selected to compose all the requirements for the new system. IBE and Cito defined the advanced set of needs to redefine the educational system for the Swiss children between the age of 4 and 13 year. This formed the new e-learning portal Mindsteps which enables the students and teachers to have access to a very advanced learning system for both high-stake and low-stake assessment based learning.


Via the portal Mindsteps the students can be tested on a regular basis on their knowledge of different topics throughout the year. Both the students and teachers have access to an item database which can be used during the whole school year. Teachers can use the item database for developing their tailor-made computer based low-stake tests or tailor-made computer based learning units. Both can be allocated to a student or to a specific group of students. Students can use the item database for learning wherever they are (outside of school).

The primary function of the item database for teachers and students is to deliver data driven information about the learning processes of students. By means of differentiation within each class or learning group this instrument is adapted and advanced to support the individual learning progress.

The technical basis for the project is a well-designed IT-Solution. All items are stored in an item database (Aufgaben-Datenbank). A web application has been developed for administering high-stake, and low-stake testing as well as learning.


Trifork was asked to solve the most challenging part of the project; providing the digital assessment platform: the heart of the e-learning portal Mindsteps.

“Major reason for selecting Trifork as partner has been their QTI Assessment Delivery Engine product in combination with their extensive knowledge of large-scale digital assessment systems”, says Urs Moser, head of IBE. “We were especially impressed of their work done for the Dutch Board of Exams where they have implemented one of the most advanced digital assessment engines in an environment suited for 30.000 concurrent assessments”. Trifork’s QTI Assessment Delivery Engine is a quality product which enables digital assessments of the future for many organisations. Built with the latest technologies, the platform is an ultra scalable solution for any serious assessment organisation. The low-stakes requirements of IBE creates the challenge to support many type of devices, something the Assessment Delivery Engine is very capable of with a complete HTML5 based implementation.

The Assessment Delivery Engine is completely based on IMS QTI, the worldwide standard for digital assessments. Thru the support of this standard Trifork is interoperable with many external assessment systems, like the authoring system of Cito’s Questify Builder.

With an agile project approach, Trifork has delivered the right functionality on time for the project. This has enabled the successful delivery of the Mindsteps portal, providing a solid basis for the future plans of Bildungsraum Nordwestschweiz.

“Trifork has proven to be a worthy partner for us on both the technological and the digital assessment domain. In a short timespan they were capable of delivering a very advanced digital assessment system which enables us to meet our current and future needs”

QTI Assessment Delivery Engine

Trifork’s assessment delivery engine is a state-of-the-art player capable of delivering and automatically scoring QTI assessments. This engine delivers the latest version of IMS QTI assessments to any HTML capable device.

Trifork is a trusted QTI implementation partner for many customers within the Educational domain, including integration of the engine within existing assessment environments. With the use of client-lock-down technology, this engine is now also capable of securely delivering the examinations. This combined with the interoperability between several author and assessment environments proves it to be a very powerful tool.

The QTI Assessment Delivery Engine makes it possible to publish, deliver and score assessments for practicing, assessing and examining within any assessment environment.

College voor Toetsen en Examens

College voor Toetsen en Examens

The College voor Toetsen en Examens (het CvTE) is an independent administrative board, responsible for all exams in secondary education and exams for Dutch as second language (necessary for obtaining a Dutch citizenship).

The mission of this board is to guarantee the quality of the exams and to provide circumstances that assure a smooth examining. Moving all online school exams to the QTI 2.1 format is part of the strategy of succeeding in this mission.

Business challenge

The system the CvTE has in place now is capable of planning, presenting and correcting exams. This system is developed over ten years ago not meeting today’s standards and witholding any innovation on future development. The CvTE decided that a new system for digital examining was a logical investment. Further development on the old system would not be cost effective, since the new features CvTE needed, would have a major impact on the overall architecture of the system. Data storage and retrieval and the planning module are the responsibility of DUO (Dienst Uitvoering Onderwijs). The modules to preview, view, correct, review and practice exams with, are Trifork’s responsibility.

Project outline

The most visible improvement is the user interface. For all the tools Trifork created a new interaction and visual design. The new design had to preserve all the things that people liked after ten years of use. In the same time several tools were introduced and embedded in the examining environment; calculator, notepad, magnifier, spell-check, protractor, ruler, marker, special characters, and formula editor.

A major audible improvement is the text to speech (TTS) integration. Trifork integrated Acapela TTS which makes it possible to have all text based content read to you. Trifork supports Dutch and 3 other languages. The TTS switches language automatically when the language within a text changes.

The content of the exams is provided by Cito, and needs to be imported into the assessment platform. The results of each candidate also need to be reported back to Cito, for analysis. The system uses QTI 2.1 to exchange assessments and results. With QTI 2.1 CvTE can accept a solid, well proven and world-wide adapted content standard. This enables them to take in content from various sources and stay independent of their content suppliers.

To prevent cheating, Trifork has developed a client lock-down browser. This browser prevents access to any other application during the assessment. A browser is provided for Windows, Linux and Mac. The assessment system does a browser check when a candidate tries to start an assessment. Access with regular browsers is rejected.


The QTI is parsed to HTML in the lock-down browser. Trifork created an unique QTI engine in JavaScript that translates the QTI to HTML5 within the student’s browser. Since QTI describes the entire assessment including the answers it would impose a security risk to sent this to the browser of the candidate. For this reason Trifork created a rendering filter that strips all the data that should stay secret.

The storage and retrieval of questions and given answers is the responsibility of DUO (Dienst Uitvoering Onderwijs). Together with DUO, Trifork has designed a DAL (Data Abstraction Layer), which acts as the interface between the assessment environment and the storage infrastructure. For local development, and for the offline preview environment used by assessment constructors, Trifork has provided an in-memory implementation of the DAL.

The authentication process is part of the logistical application built by DUO. The assessment engine itself does not need to know about user details. However, it does need to be able to restrict access to only authorized candidates. For access security, Trifork has implemented HMAC validation on the URL that launches the assessment engine.

Besides the QTI player in which a student makes his assessment Trifork also created a correction component for the teachers to score manually, and a preview component for test constructors in which they can view the assessment they are creating and all the metadata that comes with it.


Although the project was a European tender with a fixed price and fixed date, CvTE managed to keep the requirements specified in de tender on a level that made it possible to fill in the details just before implementation. Some functionality was implemented gradually in several iterations. The product owner made full use of the potential that the scrum process offers and was always looking for functionality that added the most value.


The new system will provide a robust platform to facilitate the growing number of digital exams. Most of the feedback that has been generated during field test and during the real exams in which users encountered the new system are very positive. To maintain this quality the system will be evaluated constantly and will be improved in the years to come. Last but not least the project started in winter 2011 and has been delivered in spring 2013, on time and within budget.

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Trifork Learning Solutions

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Koningin Wilhelminaplein 2
1062 HK Amsterdam
+31 20 891 65 00

CEO Erwin van Schaffelaar

Twitter: @VanSchaffelaar