Whole Earth Curriculum WEC

Lesson 03 — Intended and Unintended: Two Kinds of Effect

Learners learn the difference between an **intended effect** (what a technology was designed to do) and an **unintended effect** (a consequence no one planned). They work the plastic bag as a worked example, then sort a second technology the same way.

D10 P4: Contextual & Ecological Awareness D10.S1 50 minutes Draft

Objectives

Essential question

What is the difference between an intended effect and an unintended effect of a technology?

intended effectunintended effectdesignconsequenceplastic

Materials

Standard materials

Low-tech / no-cost

Enriched / lab & device

Works in different contexts

A two-panel diagram of the plastic bag showing its intended effect (carry things cheaply and lightly) beside its unintended effect (plastic in rivers and oceans, harming wildlife)
A two-panel diagram of the plastic bag showing its intended effect (carry things cheaply and lightly) beside its unintended effect (plastic in rivers and oceans, harming wildlife)

Lesson 3 — Intended and Unintended: Two Kinds of Effect

Summary

Learners distinguish an intended effect of a technology from an unintended effect. They work the plastic bag as a worked example — designed to carry things cheaply, it also ended up in rivers and oceans, harming wildlife — then sort a second technology the same way.

Objectives

  • Explain the difference between an intended effect and an unintended effect of a technology, with an example of each. (D10.S1.07.02)

Connection

Think of a plastic bag. Somewhere, someone designed it to do one job: hold your shopping, cheaply and lightly. That part worked exactly as planned. But the same bag, dropped or blown away, can wash into a river and then the sea, where a turtle or a fish might swallow it. Nobody sat down and planned that second part — it happened anyway. Every technology has these two kinds of effect, and learning to see both is part of using tools wisely.

Materials

  • Two-kinds-of-effect sheet
  • Technology cards

Preparation

  • Copy the two-kinds-of-effect sheet and technology cards.
  • Retrieval: from Lesson 2, recall the four questions for tracing a technology (begin, travel, adopt, change). Today we zoom in on the last part — what changed — and split it into two kinds.

Facilitator note

This lesson is written to the learner (“you”). The ideas to land: (1) an intended effect is the result a designer planned for; an unintended effect is a consequence that happened anyway, planned or not; (2) “unintended” is not the same as “unimportant” — an unplanned harm is still a real harm; (3) seeing unintended effects is a skill, and it helps us design and choose better. Model the plastic bag once (worked example, S-011). The technology lens: design always aims at some effects and misses others — that gap is exactly where unintended effects live. The environment lens: many unintended effects land on the living Earth (plastic in the ocean, S-216; animals mistaking plastic for food, S-066). The egalitarian lens: unintended harm often falls hardest on people with the least power to avoid it — ask “who is harmed?” The ethics lens: noticing an unintended effect raises a question — now that we know, what do we owe? Keep the distinction descriptive first (what happened) and normative second (what we should do about it). Distinguish evidence (plastic enters rivers and oceans and can harm wildlife — S-216) from value (we should reduce it).

Procedure

  1. Recall (5 min). What four questions trace a technology’s journey? Today we split “what changed” into two kinds.
  2. Meet the two kinds (5 min). An intended effect is the result someone planned for. An unintended effect is a consequence that happened anyway, whether or not anyone planned it.
  3. Watch it modeled — the plastic bag (15 min). The bag was designed to carry things cheaply and lightly — that is its intended effect. But bags also blow into gutters, wash into rivers, and reach the ocean, where animals can swallow them or get tangled — that is an unintended effect. Sort these onto your two columns. Notice: the harm is real even though no one planned it.
  4. Sort a second technology (15 min). With a partner, take a technology card — the mobile phone or the car. List its intended effect, then list at least one unintended effect. Say which kind each is.
  5. Close (10 min). Share one unintended effect you found. Remember: unintended does not mean unimportant.

Differentiation

  • Support: Provide the bag’s effects pre-listed and ask learners to sort them into the two columns, then add one effect of their own.
  • Extension: For an unintended effect, ask “who is harmed most?” and propose one change to the design or its use that might reduce that harm.

Assessment

  • Formative (observation): Can the learner give an intended and an unintended effect of a technology and say which is which?
  • Portfolio artifact: The completed two-column sheet for one technology, kept in the portfolio.

Home connection

Choose one everyday object at home (a bottle, a phone, a food wrapper). With someone, name what it was made to do and one thing it does that probably was not planned.

Resources