Individuals:
Teachers, supervisors and teachers assistants (sources of learning design) also added to them by professionals from the environment such as doctors, lawyers, police and military personnel who are employed by the teacher in the definition of their role for learners.
Materials:
Are things that carry educational content, if the material is able to move education are called (center), such as video and audio programs, but if they do not transmit a full education to the learner is called upon not substances called modes.
Devices and equipment:
Are devices and tools that are used in the production of other sources or in the display (cameras, copiers, computer, etc.).
Places:
Are the places and environments in which they are learner interaction with other sources of learning, such as the school library, laboratory, school building ... Etc..

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