A complete, original teaching unit for Unit 4 of the Pearson Edexcel International A Level Decision Mathematics 1 (WDM11) specification, following Pearson’s IAL D1 scheme of work. Four lessons cover activity-on-arc networks and dummies from precedence tables; early and late event times and the critical path; total float and cascade (Gantt) charts; and scheduling with a lower bound on the number of workers. Each lesson opens with a starter, then has an editable PowerPoint with networks, cascade charts and scheduling diagrams drawn as native shapes, worked examples set out as the mark scheme expects, practice with answer slides, exam technique, speaker notes and an exit ticket, plus a worksheet with full answers. Also includes a 40-mark unit assessment with a detailed mark scheme and a teacher guide mapping every lesson to real WDM11 past-paper questions (referenced, not reproduced). All PDFs in A4 ( US Letter can be made available).
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£6.50