Aggregating Information¶

Strategy · All strategies
Evidence · 1 claim (1 for) · 2 studies (2 quant-synthesis), q4 · 2 of 2 report an effect size

Description¶

Aggregating involves finding and displaying patterns in discussions and other communications. The instructor (or a tool, or the learners themselves) collects contributions from many participants, identifies recurring themes, contrasts, or gaps, and re-presents them visually or in summary form — as a concept map, theme list, word cloud, or synthesis post. The goal is to convert distributed, ephemeral talk into a visible, shared artifact that the whole group can reason with.

Design Implications¶

Aggregation turns discussion from a sequence of individual utterances into an object of collective study, supporting knowledge building in which learners treat ideas as improvable and interrelated Scardamalia & Bereiter's knowledge-building principles. [+W]. It works best when the aggregated artifact is produced with learners rather than for them: having students nominate, cluster, and label contributions raises engagement from passive reception to active synthesis ICAP framework: constructive modes of engagement outperform passive modes. [+S]. The display should reduce, not add, processing demands — an unstructured wall of quotes imposes its own cognitive load [~M].

Context¶

Requirements¶

• A communication channel with a persistent record (discussion forum, shared document, chat, sticky-note wall)
• A method for identifying patterns: coding by theme, clustering, voting, or automated text analysis
• A display format that makes the pattern visible at a glance (concept map, affinity board, theme summary)
• Time in the learning session to work with the aggregate, not just view it

Constraints¶

• Instructor-led aggregation after the fact can arrive too late to shape learners' thinking; the pattern must be surfaced while the discussion is still live [-W]
• Aggregates that flatten disagreement into consensus hide productive conceptual conflict; preserving minority and contrasting positions is essential [~M]
• Automated visualizations (e.g., word clouds) can foreground frequent but trivial terms and mislead learners about what matters [-W]
• Requires equitable participation; aggregation over a discussion dominated by a few voices amplifies that skew [~M]

Implementation Variability¶

• Instructor-aggregated: teacher synthesizes themes mid-discussion and posts a running map (low student effort, fast)
• Learner-aggregated: students cluster peers' contributions in small groups, then justify their groupings (higher cognitive demand, better retention of the ideas themselves)
• Tool-aggregated: platforms such as Knowledge Forum or Perusall's analytics automatically surface rise-above notes, common questions, or annotation patterns
• Rising-up ("rise-above") notes: later contributions that synthesize earlier ones, a core knowledge-building move

Target Learners¶

• Learners in large-enrollment or online courses where individual contributions otherwise disappear into volume [~M]
• Novices who need help seeing the structure of a domain-wide discussion; provided visual organization supports novice comprehension Graphic organizers support novice comprehension. [+M]
• Less beneficial for advanced learners who can already synthesize across sources unaided; the scaffold becomes redundant [~W]

Target Learning Goals¶

• Synthesis: identifying themes and relationships across many contributions
• Metacognition: recognizing what the group knows, wonders, and disagrees about
• Community knowledge building: developing a shared, improvable understanding rather than isolated individual views

Instructions¶

1. Collect contributions in a persistent, searchable channel (Class Discussion).
2. Mid-discussion, identify candidate themes, contrasts, or unanswered questions — either yourself or by having students nominate contributions.
3. Cluster and label the contributions into a visible artifact (concept map, affinity board, theme list), preserving disagreements rather than erasing them.
4. Display the aggregate and have learners work with it: revise it, add missing ideas, or use it to set the next inquiry direction.
5. Return to the aggregate at the close of the unit so learners can see how the shared understanding evolved.

Related Strategies¶

• Activating prior knowledge — aggregation at the start of a unit surfaces the group's prior ideas for collective examination
• Think-pair-share — the pair discussion generates the raw material that whole-class aggregation then organizes

Examples¶

• Knowledge Forum (IKIT) — Scardamalia and Bereiter's platform built around aggregating student notes into "rise-above" views, where learners explicitly synthesize earlier contributions into higher-level ideas.
• Perusall (perusall.com) — social annotation platform that automatically aggregates student highlights and questions into analytics showing instructors the most-confused passages, which then structure the next class session.
• Mentimeter / Poll Everywhere word clouds — live aggregation of free-text responses into a shared visual during lecture, used to surface the distribution of prior conceptions before instruction.
• Affinity mapping in design thinking (Stanford d.school methods) — students cluster individually generated sticky notes into named themes, performing the aggregation themselves.

Key Sources¶

• Scardamalia, M., & Bereiter, C. (2006). Knowledge building: Theory, pedagogy, and technology. In R. K. Sawyer (Ed.), The Cambridge Handbook of the Learning Sciences (pp. 97–118). Cambridge University Press. doi:10.1017/cbo9780511816833.008
• Chi, M. T. H., & Wylie, R. (2014). The ICAP framework: Linking cognitive engagement to active learning outcomes. Educational Psychologist, 49(4), 219–243. doi:10.1080/00461520.2014.965823
• Hewitt, J., & Scardamalia, M. (1998). Design principles for distributed knowledge building processes. Educational Psychology Review, 10(1), 75–96. doi:10.1023/A:1022810231840
• Bonwell, C. C., & Eison, J. A. (1992). Active learning: Creating excitement in the classroom (ASHE-ERIC Higher Education Report No. 1). George Washington University.