What a Building Site Does to a Street
A 55-minute Grade 5 lesson on effects that fall on people who were never part of a public decision.
What a Building Site Does to a Street is a free 55-minute Grade 3 to Grade 5 social studies lesson plan for Common Core standard D2.Eco.8.3-5 — give examples where a choice affects people who were not part of it. It is timed across 5 sections, gives the exact wording to use where the wording carries the mathematics, names 3 misconceptions with the teaching move that addresses each, and ends with an exit ticket and a printable worksheet with its answer key.
- Grade:
- Grade 3 to Grade 5
- Length:
- 55 minutes
- Standard:
- D2.Eco.8.3-5
Grade 3 to Grade 5 · Economics
D2.Eco.8.3-5
Identify examples of external benefits and costs.
Objective
Students will be able to identify an external effect of a public programme and say who bears it.
Students are successful when they can
- Names who is outside the decision.
- Classifies the effect as cost or benefit.
- Says what a government could do about an external cost.
What you need
- The council report on building upward
- Twelve effect cards
- The printable practice sheet linked at the end of this plan
The lesson
Warm-up — who was not asked?
5 min- A council decides to build upward on cleared land.
- Ask who is affected and was not in the room.
Teach — outside the decision
18 min- Draw the circle: council and future tenants inside; the existing street outside.
- Put lost light and a changed street outside. External costs, borne by people who did not decide.
- Put drains laid for one street serving the next outside. An external benefit.
- Contrast with the rates paid by everybody: a cost, but one the public decided through a council.
- Say the test: was this person part of the decision in any way?
- Now the Grade 5 addition: what can a government do about an external cost?
- Compensate, consult, or design differently. Name all three and their limits.
“Did these people have any part in the decision at all?”
Guided practice — sort and remedy
17 min- Pairs sort twelve effect cards into external cost and external benefit.
- They set aside anything inside the circle.
- For three costs they propose a remedy and name its limit.
Independent practice
12 min- Students complete the 'What a Building Site Does to a Street' page.
- Check the person affected is genuinely outside the decision.
Close
3 min- Name one external effect of something the school does.
What goes wrong, and why
Each of these is a reasoning error rather than carelessness. The fix addresses the reasoning.
Calls rates an external cost.
Why: It is money leaving people.
Fix: Rates are decided through an elected council. External means outside the decision.
Thinks external effects are always harmful.
Why: Cost is the memorable half.
Fix: Drains laid for one street serving the next is external and a benefit.
Names an effect with nobody attached.
Why: Effects are easier to see than sufferers.
Fix: Insist on a name: the neighbouring street, the village on the bus route.
If they are not there yet
- Six cards, three of each kind.
- Give the person and ask whether the effect helps or harms them.
If they finish early
- Find an effect that is a cost to one group and a benefit to another.
- Say who should pay for roads broken by construction traffic.
- Design a consultation that would have caught one external cost.
Exit ticket
A council builds upward and a neighbouring street loses its light. Why is that an external cost?
What to look for: The neighbours were not part of the decision in any way. Answers about it being unfortunate miss the decision test.
Printable practice for D2.Eco.8.3-5
Free to print and copy, answer key included. Each sheet can generate a fresh set of problems for a retake.
- What a Building Site Does to a StreetSort each effect into cost or benefit.
Questions about What a Building Site Does to a Street
How long does the What a Building Site Does to a Street lesson take?
55 minutes, split across 5 timed sections: warm-up 5 min, teach 18 min, guided practice 17 min, independent practice 12 min, close 3 min. The minutes are stated per section and add up to the stated length, so the plan can be cut or extended at a section boundary rather than abandoned halfway.
Which standard does What a Building Site Does to a Street teach?
D2.Eco.8.3-5 — D2.Eco.8.3-5, Economics for Grade 3 to Grade 5: “Identify examples of external benefits and costs.” In plain terms, give examples where a choice affects people who were not part of it.
What do I need to teach this lesson?
The council report on building upward, twelve effect cards and the printable practice sheet linked at the end of this plan. Everything listed is either ordinary classroom equipment or a free printable from this site — there is nothing to buy and nothing to prepare beyond photocopying.
What mistakes should I expect in this lesson?
Three, each a reasoning error rather than carelessness: calls rates an external cost; thinks external effects are always harmful and names an effect with nobody attached. The plan gives the thinking behind each one and the teaching move that addresses the thinking rather than the symptom.
How do I know whether the lesson worked?
The exit ticket asks: “A council builds upward and a neighbouring street loses its light. Why is that an external cost?.” The neighbours were not part of the decision in any way. Answers about it being unfortunate miss the decision test. That tells you whether the class needs a reteach or a thirty-second conversation before you plan tomorrow.
Is there a worksheet to go with What a Building Site Does to a Street?
Yes — 1 printable D2.Eco.8.3-5 worksheet, linked at the end of the plan and free like the rest of the site. Each one comes with an answer key and 25 versions, so the practice after the lesson can be a different paper on every desk.
Is What a Building Site Does to a Street free to use?
Yes. The plan, its printables and their answer keys are free to read, print and photocopy for your own class, with no account and no email capture. It was last reviewed on 7 September 2026. Please do not resell it or republish it as your own.
Last reviewed 2026-09-07. Aligned to D2.Eco.8.3-5 of the C3 Framework for Social Studies State Standards.