Database indexing | PPT + Worksheets + Activity + MCQ Quiz + Answer Marking Scheme

Database indexing | PPT + Worksheets + Activity + MCQ Quiz + Answer Marking Scheme | Complete Lesson Pack for Cambridge IGCSE, AS & A-Level Computer Science

Also suitable for AQA GCSE Computer Science, OCR GCSE Computer Science, Edexcel Computer Science and A-Level Computer Science teachers.

**1 - DB_Indexing_CoreLecture.pptx — 30 **

Covers the full topic across 10 sections: why indexes matter (O(n) vs O(log n) scan visual) → definitions & analogy → lookup path mechanism → primary/secondary/clustered/non-clustered → composite/covering/partial → B-tree structure (animated tree diagram) → B-tree range queries → hash indexes → SQL CREATE/DROP/SHOW INDEX → EXPLAIN plan reading (with real output breakdown) → index design golden rules → trade-off matrix (color-coded read/write/storage grid) → worked e-commerce example → practice questions → key terms glossary → summary slide.

2 - DB_Indexing_Worksheet.docx — 50-mark structured worksheet

Section A (20 marks): definitions, true/false with corrections, lookup-path ordering, SQL identification. Section B (20 marks): writing indexes for 4 real queries, EXPLAIN analysis, and a 6-index design decision task. Section C (10 marks): two extended-response evaluations on index trade-offs and clustered vs non-clustered.

3- DB_Indexing_ClassroomActivity.docx — 5 collaborative tasks

Activity 1: “Is this index worth it?” decision table. Activity 2: B-tree traversal relay (trace search paths by hand). Activity 3: EXPLAIN diagnosis lab (3 broken queries to fix). Activity 4: Social media platform index design challenge (team task). Activity 5: Python refactoring explanation homework.

4 - DB_Indexing_MCQQuiz.docx — 20 MCQs, 25 minutes

Covers every topic: time complexity, B-tree vs hash, clustered vs non-clustered, composite leftmost-prefix rule, EXPLAIN fields, cardinality, covering indexes, partial indexes, CREATE INDEX syntax, write overhead.

5 - DB_Indexing_Answers_MarkingScheme.docx — Full mark scheme (teacher copy)

Model answers with mark allocations for every worksheet question, banded descriptors for extended responses, MCQ answer key with explanations for the 5 most commonly missed questions, and full solutions for all 5 classroom activities including the social media index design.

All worksheets are print-ready

Fully editable resources.

Great for: classroom teaching, revision lessons, flipped learning, homework tasks.

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