Where Two Explanations Overlap
A 55-minute Grade 5 lesson on finding the contested idea when two causes are both real and cannot be separated.
Where Two Explanations Overlap is a free 55-minute Grade 3 to Grade 5 social studies lesson plan for Common Core standard D1.2.3-5 — name the ideas behind a big question, including ones people answer differently. 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:
- D1.2.3-5
Grade 3 to Grade 5 · Developing Questions and Planning Inquiries
D1.2.3-5
Identify disciplinary concepts and ideas associated with a compelling question that are open to different interpretations.
Objective
Students will be able to identify the contested idea in a question and say why two causes can both be true.
Students are successful when they can
- Names the contested idea.
- Gives two defensible readings of it.
- Explains why overlapping causes are hard to separate.
What you need
- The 2011 national history extract
- The broadcast and the white paper
- The printable practice sheet linked at the end of this plan
The lesson
Warm-up — the historians' quarrel
5 min- Read that the author blames shortages and her critics blame the choice of builder.
- Ask whether both could be right.
Teach — the contested idea is 'cause'
18 min- Underline 'set the pace of rebuilding'. Ask what would count as setting the pace.
- Reading one: without bricks nothing could be built, whoever was building.
- Reading two: councils were slower than firms would have been, whatever the bricks.
- Read the author's own concession: she cannot separate the two causes with certainty.
- Say the point: the contested idea here is what it means for one cause to be decisive.
- Do a second question: 'was the programme a success?' The contested idea is the standard.
- Name the pattern: the contested word is a judgement or a measure, never a date or a total.
“Which word here would two careful people define differently?”
Guided practice — two readings each
17 min- Pairs take five questions and underline the contested idea.
- For three, they write both readings and who would hold each.
- Groups settle any question where they underlined different words.
Independent practice
12 min- Students complete the 'Where Two Explanations Overlap' page.
- Check the choice is a judgement, not a figure.
Close
3 min- Post the contested words as the terms the unit will have to define.
What goes wrong, and why
Each of these is a reasoning error rather than carelessness. The fix addresses the reasoning.
Picks a number as the contested part.
Why: Numbers look disputable when sources disagree.
Fix: Ask whether anybody here disputes it. Usually nobody. That is settled.
Insists one of two causes must be the real one.
Why: Single causes are tidier.
Fix: Read the concession again. She says the two cannot be separated with certainty.
Gives one reading and calls the other wrong.
Why: Deciding is more comfortable than describing.
Fix: Give both readings first. Choosing between them comes later, with evidence.
If they are not there yet
- Three questions with the judgement word circled.
- Match a reading to the person who would hold it.
If they finish early
- Say what evidence would separate the two causes.
- Rewrite a settled question so it becomes contested.
- Find a contested measure in an argument about your own school.
Exit ticket
'Did shortages or choices set the pace?' Which idea is contested, and why can both causes be real?
What to look for: What it takes for a cause to be decisive, with both operating at once. Naming bricks or councils means the contested idea is not yet located.
Printable practice for D1.2.3-5
Free to print and copy, answer key included. Each sheet can generate a fresh set of problems for a retake.
- Where Two Explanations OverlapCircle the idea that is genuinely contested.
Questions about Where Two Explanations Overlap
How long does the Where Two Explanations Overlap 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 Where Two Explanations Overlap teach?
D1.2.3-5 — D1.2.3-5, Developing Questions and Planning Inquiries for Grade 3 to Grade 5: “Identify disciplinary concepts and ideas associated with a compelling question that are open to different interpretations.” In plain terms, name the ideas behind a big question, including ones people answer differently.
What do I need to teach this lesson?
The 2011 national history extract, the broadcast and the white paper 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: picks a number as the contested part; insists one of two causes must be the real one and gives one reading and calls the other wrong. 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: “'Did shortages or choices set the pace?' Which idea is contested, and why can both causes be real?.” What it takes for a cause to be decisive, with both operating at once. Naming bricks or councils means the contested idea is not yet located. 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 Where Two Explanations Overlap?
Yes — 1 printable D1.2.3-5 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 Where Two Explanations Overlap 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 D1.2.3-5 of the C3 Framework for Social Studies State Standards.