Macro-Design · Full course or program design cycles

Pebble-in-the-Pond Model

A content-first instructional design model that begins with a core problem and expands outward to define the necessary skills and strategies. It serves as an alternative to traditional 'objectives-first' design by focusing on the functional whole-task from the start.

When to use Pebble-in-the-Pond Model

Best used during the initial design and development phase of a new course or curriculum to ensure alignment between tasks and content.

How Pebble-in-the-Pond Model works

Instructional designers use this to map out a curriculum by first identifying a representative task (the pebble) and then designing a series of increasingly complex versions of that task before ever writing specific learning objectives.

Phases of Pebble-in-the-Pond Model

  1. Problem (The Pebble): Start by specifying one whole, real-world problem or task that learners should be able to solve after instruction, with a complete example. Designers begin here rather than with abstract objectives.
  2. Progression of Problems (The Ripples): Design a sequence of similar problems that grow in complexity, so learners build skill through increasingly demanding whole tasks. Each problem is demonstrated or practised in turn.
  3. Component Knowledge/Skills (The Waves): Identify the specific knowledge and skills needed for each problem in the progression, and decide where each is taught. Components are taught in the context of the problems, not as separate topics.
  4. Instructional Strategy (The Flow): Add strategies that engage learners, such as activation, demonstration, application with feedback, and integration through reflection or peer work. This is where Merrill's First Principles shape each activity.
  5. Interface Design (The Surface): Finalise the design: the look, navigation, media and assessment of the learning materials, plus evaluation and revision. This comes last, after content and strategy are settled.

Key principles

  • Design should be task-centered rather than objective-centered
  • Instructional components should be derived from the requirements of the task
  • Learners should be exposed to a progression of increasingly complex whole-tasks

Best for

  • Curriculum architecture
  • Technical and vocational training
  • Enterprise-level learning programs

Considerations

  • Requires subject matter experts who can identify 'whole tasks' rather than just topics
  • Can be a significant shift for organizations accustomed to traditional ADDIE or objective-based models

Attribution & sources

Developed by M. David Merrill, 2002

Primary source

Design a session with Pebble-in-the-Pond Model

METODIC builds a complete Pebble-in-the-Pond Model-based session — methods, timing, worksheets, and facilitator guides — in minutes.

Try METODIC free