WebLearning supports the elements and structure of units of learning as outlined in the IMS Global Learning Design Specification - see extracts below.
(Reference: www.imsglobal.org/learningdesign/ldv1p0/imsld_bestv1p0.html)

"The IMS Learning Design workgroup's (LDWG) goal is to work towards establishing specifications for describing the elements and structure of any unit of learning, including:

• resources
• instructions for learning activities
• templates for structured interactions
• conceptual models (e.g., problem-based learning)
• learning goals, objectives and outcomes
• assessment tools and strategies

The specifications, which describe this framework, need to:

• describe and implement different kinds of learning approaches
• enable repeatable, effective, and efficient units of learning
• support multiple delivery models
• support reuse and re-purposing of units of learning or their component elements
• support the reuse or repurposing of the framework and components of a unit of learning
• leverage existing specifications and standards
• be culturally inclusive and accessible (internationalization)
• support multiple learners and multiple roles in a learning activity, reflecting learning experiences that are collaborative or group-based
• support reporting and performance analysis

The goal is to enable many kinds of educational designs to be created, using a consistent notation, which can be implemented uniformly in multiple courses or learning programs."