DSE History | The United Nations and the Post-War Order: Tutor Lesson Plan

2026-11-04

Tutor lesson-prep guides · Secondary History

Students treat “the UN keeps the peace” as a complete answer until one question exposes it: why could it act in Korea but not in Hungary? One mechanism has to explain both outcomes.

Objectives — Students can: (1) name two ways the UN fixed the League of Nations; (2) use the veto to explain the limits on Security Council action; (3) compare one success and one failure by the same conditions.

01 Prerequisites (3-minute check)

If any of these fails, fix it before the lesson starts.

Skill	Quick check	Pass mark
League of Nations	Why the League could not stop aggression	No army, no USA, unanimous votes
Second World War	End year and the lesson drawn	1945, never again
Cold War	The basic US-Soviet split	Ideology and spheres of influence

02 Lesson flow (60 minutes)

Time	Stage	Tutor does	Student does
0-8 min	Diagnosis	Sort three organisation cards	State the difference
8-22 min	League to UN	Charter, Council, Assembly	List two reforms
22-36 min	The veto	Procedural and substantive votes	Describe the effect
36-48 min	Case contrast	Korea and Hungary 1956	Complete the table
48-56 min	Question drill	Source and causation items	Answer in steps
56-60 min	Exit check	Three quick items	Spoken answers

03 Teaching script (read it out)

Scene 1: Act 1: What the UN actually fixed

The League failed for three reasons: no standing force, the great powers were not all inside, and every decision needed unanimity. The UN was founded in 1945 with 51 members and now has 193. It fixed three things: the great powers hold permanent seats, military action can be authorised, and majority voting replaces unanimity.
Students do: name the one League defect the UN solved.
Common slip: believing the UN owns an army; it borrows troops from members.

Tutor move: two-column table, League defect on the left; nobody leaves a right-hand cell empty.

Scene 2: Act 2: The veto as a built-in lock

The Security Council has 5 permanent members, so one objection blocks any substantive resolution: single votes carry 20 percent blocking power. The Assembly needs 67 percent for important questions, but Assembly resolutions bind nobody.
Students do: say who the veto protects and what it paralyses.
Common slip: treating an Assembly resolution as enforceable.

Tutor move: role-play one student as the Soviet delegate and ask whether they would vote yes.

Scene 3: Act 3: One mechanism, two outcomes

Korea 1950: the Soviet Union was boycotting over the Chinese seat, so the Council authorised action and collective security worked. Hungary 1956: the Soviet Union was present and vetoed, so the UN could only condemn.
Students do: fill two rows showing that the presence of the veto holder decides it.
Argument: collective security depends on great-power agreement, not on the charter.

Tutor move: give the outcome first, then have them reason backwards to the cause.

04 Question types and worked steps

Type	Example	Steps
Source question: stance	Read, underline, identify stance, counter with evidence	At least two facts
Causation: why it failed	Mechanism, condition, case, conclusion	Three links minimum
Comparison: League and UN	Set criteria, compare item by item, conclude	An example per item
Evaluation: UN effectiveness	Split into peace, rights, development	One point each way

Sanity check (teach this): Dates must be exact: founded 1945, 51 founding members, 193 today; 5 permanent members, one vote blocks, not 5. The organisation is 81 years old, so never write “over a century”.

05 Independent practice (3 questions)

Question	Answer	What to watch
Year the UN was founded	1945	Same year the war ended
Permanent members of the Security Council	5	Count the vetoes
Majority needed for important Assembly questions	67%	Two thirds, not half

06 Common mistakes and what to say

Mistake	Student writes	Say this
Assembly resolutions treated as binding	Writing that they must be obeyed	“Which body passes binding decisions?”
League and UN confused	Saying both had an army	“Did the League have a standing force?”
Veto mistaken for unanimity	Writing that all five must agree	“Does one objection differ from five?”
Cases without conditions	Giving outcomes only	“Was the Soviet delegate in the room in 1950?”

07 Homework (paper, section and question numbers)

Collective security cases (in-house) — Questions 1-4: Korea and Hungary
Source stance practice (in-house) — Questions 5-6: stance and evidence

08 Exit check (last 5 minutes)

Question	Answer	Decision
Year of foundation	1945	Wrong: reteach the timeline
Body holding the veto	Security Council	Wrong: reteach the two bodies
Why no action in Hungary 1956	Soviet veto	Wrong: reteach the case

09 Tutor FAQ

Why did the USA stay out of the League

The Senate rejected the Treaty of Versailles, fearing entrapment.

Can the veto be abolished

Amending the charter needs every permanent member to agree, including the one losing it.

How is peacekeeping different

It needs consent, uses force only in self-defence; collective security targets an aggressor.

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A TutorZone lesson-prep guide. Written by the TutorZone team; questions and lesson flow are original and are not taken from any school or publisher material.