Cadmos is a graphical editor that appeals to practitioners with basic computer skills and knowledge of learning standards. The designer creates two different models:
We used Cadmos to represent Lesson 2 of the “Healthy Eating” scenario. Figure 1 shows the conceptual model of the learning scenario “Healthy Eating-Lesson 2”. In this model, 14 simple activities are described:
In every simple activity we have defined the following metadata, which are not shown in the figures:
Before the practitioner uses the canvas in order to design the conceptual model, s/he has defined some metadata for the lesson i.e. title, description, learning goals, prerequisites and roles, in previous screens. These screens are not shown in this section. So when s/he creates the activities s/he selects and corresponds to them one learning goal and one prerequisite from the aforementioned. One limitation that the tool has in this version is that the designer cannot correspond to each activity more than one learning goals or prerequisites.
In the description field, every activity is described in detail, whereas in the role field the corresponding role is determined. The type field gives the opportunity to the designer, to watch at any time through the “Statistics” command of the tool, what types of activities s/he has used.
The types of the activities for the described lesson are:
Figure 1: Conceptual Model of the Healthy Eating-Lesson 2
As we can see in Figure 1, every simple activity has its corresponding resource. In Cadmos we define the following metadata for every resource, which are not shown in the figures:
4. Type (hypertext, audio, video, assessment, forum, quiz)
5. Copyright (free, proprietary)
6. Resource File
In the suggested scenario we defined the type of the resources of the first two activities as video and hypertext respectively. For the rest of the activities, we do not have the appropriate type in our list, as the tool was developed at first in order to design electronically supported lessons. One of our goals is to enrich the list of the types for both the resources and the activities in next releases of Cadmos.
Figure 2 shows the flow model of the scenario. In this model we see three different swim lanes, one for each role i.e. student, teacher, group. The activities are set in the vertical axis, according to their chronological order. The model is divided into seven different phases as the scenario suggested.
Figure 2 Flow Model of the Healthy Eating-Lesson 2
In Cadmos flow model, the designer can specify the duration of a learning activity by using the time-limit rule. The designer cannot specify the duration of a set of activities, i.e. the activities of a phase, as the specific scenario demands. Thus in order to give this information, we added a comment next to the separator line of each phase. Cadmos supports two more rules i.e. user-choice and score-condition rules, but we did not use them in the flow model because there weren’t any in the scenario.
As a conclusion we were able to represent Lesson 2 of the ‘Healthy Eating’ scenario in our tool, though we noted some constraints or lacks that Cadmos had in the description of face to face scenarios.