TRAKLA2 is a Web-based learning environment for data structures and
algorithms. The system delivers automatically assessed algorithm
simulation exercises that are combined with electronic course material and
includes a management system that keeps track of a learner's progress. The
learner solves TRAKLA2 exercises by manipulating conceptual visualizations
of data structures in order to simulate the working of a given algorithm.
The system is capable of grading the exercises, and thus can provide
automatic immediate feedback on the learner's performance. The input data
for the algorithm in each exercise is randomized in order to prevent
plagiarism. In addition, the learner can consult electronic course
material if required. Moreover, a database system is utilized to store the
learner's performance data.

In this presentation we show the current state of the TRAKLA2 system,
present an overview of its architecture, and give a demonstration on how
a learner may use the system.