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Last updated

3 August 2026

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These guides are designed to assist with planning your review or revision. They are concise, up-to-date, and strictly follow the revised syllabus. Developed through collaboration among many teachers, these resources aim to be practical teaching aids. If they prove useful in your instruction, kindly consider leaving a review. Your feedback is invaluable in improving our guide creation process. Additional guides can also be found in the store.

This comprehensive Pearson Edexcel IAL Decision Mathematics D1 (WDM11/01) Master Revision Guide provides complete specification coverage for this unique unit that rewards systematic algorithmic execution rather than algebraic manipulation. Aligned with the 2019–2025 exam series and based on examiner reports, this resource helps students master sorting algorithms, network optimisation, linear programming, and project scheduling.

What’s inside?

Topic frequency heatmap – Critical topics (★★★★★) appear in every sitting: bubble sort and quick sort, Kruskal’s and Prim’s MST algorithms, Dijkstra’s shortest path, Chinese Postman route inspection, maximum matching, linear programming (formulation, graphical solution, integer LP), and critical path analysis (forward/backward pass, critical path, float).

Top examiner-penalised errors

Algorithm reference audit – No formula booklet is provided in D1.

Full worked examples – Step-by-step solutions for bubble sort (all passes, final zero-swap pass), quick sort (sublists and pivots), Prim’s on a distance matrix, Dijkstra’s table with backtracking, Chinese Postman with all 3 pairings for 4 odd vertices, maximum matching via augmenting path, LP formulation and graphical solution, and CPA with float table.

Exam strategies – Show ALL working (M marks require intermediate steps), LP on graph paper (never freehand), CPA start node late time must = 0, Dijkstra’s table format first.

Predicted topics – High-confidence predictions

How I use this guide:

For students – D1 marks are earned by showing algorithm steps. Never write only the final answer. For Dijkstra’s, draw the table first. For Prim’s matrix, cross out columns as you go. For LP, always use graph paper. For CPA, forward pass = MAX, backward pass = MIN.

For teachers – Use weakness profiles to diagnose students (Step-Skipper, Kruskal/Prim Conflator). The algorithm reference audit (Section 15) provides a complete checklist for every examinable procedure.

Independently produced by Samata Reviews. Not affiliated with or endorsed by Pearson Education Limited or Edexcel.

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Get this resource as part of a bundle and save up to 20%

A bundle is a package of resources grouped together to teach a particular topic, or a series of lessons, in one place.

Bundle

Pearson Edexcel IAL Mathematics Complete Revision Bundle | Pure, Further Pure, Mechanics, Statistics & Decision | P1–P4, FP1–FP3, M1–M3, S1–S3, D1 | Topic Heatmaps, Worked Examples & Predicted Topics

This ultimate bundle contains all Pearson Edexcel IAL Mathematics Master Revision Guides – Pure Mathematics (P1–P4), Further Pure Mathematics (FP1–FP3), Mechanics (M1–M3), Statistics (S1–S3), and Decision Mathematics (D1). Covering the entire IAS and IA2 specification across all routes, this resource is aligned with the 2019–2025 exam series and based on examiner reports – helping students move from grade U to A*. Key features across all guides: Topic frequency heatmaps – Critical topics (★★★★★) appear in every sitting. Revise these first. Top examiner-penalised errors – Direct from examiner reports: missing working (Dijkstra’s), wrong tail in hypothesis tests, σ vs σ² confusion, Var(X-Y)=Var(X)+Var(Y), Kruskal’s rejected arcs not stated, CPA forward/backward pass reversed, and hypothesis stated in terms of X not the parameter. Formula & identity audits – Clear distinction between what is in the formula booklet and what MUST be memorised. Full worked examples – Step-by-step solutions with examiner commentary for every topic. Command words decoded – Precise guidance for ‘prove by induction’, ‘show that’, ‘hence’, ‘determine’, ‘explain’, ‘discuss’, ‘compare and contrast’, and ‘calculate’. Student weakness profiles – Diagnostic tools for each subject area: Algebra Slippage, Induction-Avoider, Diagram-Skipper, Parameter-Confuser, Step-Skipper, and more. Revision plans – 8-week and 4-week intensive plans, plus final week protocols. Exam strategies – Time management (75 marks/90 min = 72 sec per mark), in-exam checking strategies, and recovery when stuck. Predicted topics – High-confidence predictions across all units. How I use this bundle: For students – Start with the heatmap for your target unit. Practise ‘show that’ questions weekly (30% of AO2 marks). For A*: P3+P4 ≥180/200 UMS (Pure) and FP2+FP3 ≥180/200 UMS (Further Pure) and M2+M3 ≥180/200 UMS (Mechanics) and S2+S3 ≥180/200 UMS (Statistics). For teachers – Use weakness profiles to diagnose students across all routes. The formula self-test checklists track memorisation. The 8-week plans structure revision across all units. This bundle includes: Pure P1–P4 (WMA11–WMA14), Further Pure FP1–FP3 (WFM01–WFM03), Mechanics M1–M3 (WME01–WME03), Statistics S1–S3 (WST01–WST03), and Decision Mathematics D1 (WDM11). Download now for complete exam preparation – from algebra to vectors, from complex numbers to eigenvectors, from SUVAT to SHM, from Normal distributions to non-parametric tests, and from sorting algorithms to critical paths. *Independently produced by Samata Reviews. Not affiliated with or endorsed by Pearson Education Limited or Edexcel.* #EdexcelIALMathematics #IALMathsBundle #PureMathematics #FurtherPureMathematics #Mechanics #Statistics #DecisionMathematics #P1 #P2 #P3 #P4 #FP1 #FP2 #FP3 #M1 #M2 #M3 #S1 #S2 #S3 #D1 #WMA11 #WMA12 #WMA13 #WMA14 #WFM01 #WFM02 #WFM03 #WME01 #WME02 #WME03 #WST01 #WST02 #WST03 #WDM11 #ALevelMathsRevision #EdexcelMaths #TopicHeatmap #ExamPredictions #WorkedExamples #MathsTeacherResources

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