In closing, we consider it a milestone to integrate multiple ITS learning resources in a single ElectronixTutor system.
The growing use of multiple devices and multiple activities and learning resources make it particularly important to have a mechanism to maintain accurate and current information about learning.
One possible extension is the use of Mashup technology to make it possible to use multiple search agents in order to retrieve learning resources from multiple repositories, thus enhancing learning-content provision.
The design process for the ElectronixTutor architecture required generalizable solutions for integrating multiple pre-existing ITSs and conventional learning resources into a coherent user experience.
There must be a balance between the ability to switch between tasks quickly and the resources needed for simultaneous storage of multiple learning networks.
It can extend across time and locations, offer ubiquitous access to learning resources, encompass physical and digital worlds, engage multiple types of device, and integrate different approaches to teaching and learning" Sharples et al. (2014, p. 24).
Well-designed visualizations with affordances that are known to promote learning, like variable manipulations, dynamic multiple representations, and others, have been shown to be effective learning resources (Linn and Eylon 2006).
Since our learning resources are of very different types (conversation, simulation, multiple choice, etc)., we cannot assume that all resources contribute to the assessment equally.
It is difficult for e-learners to make decisions on how to learn when they are facing with a large amount of learning resources, especially when they have to balance available limited learning time and multiple learning objectives in various learning scenarios.
For this purpose, our model is designed as a set of ontological resources that have been extended, standardized, interrelated and adapted to be used in multiple learning environments.
