MYP Maths Extended Functions – Unit E4 lessons and assessment

MYP maths extended unit on functions extended, years 4–5: 5 animated lessons, worksheets and 3 criteria A–D assessments with rubrics.
Students find composite and inverse functions, sketch rational functions with asymptotes, stretch and transform graphs, and choose and use functions to model real situations such as shared costs. The unit is framed by the global context of fairness and development.
What’s included
• 5 animated PowerPoint lessons (65 slides, plus PDF copies): Composite Functions; Inverse Functions; Rational Functions; Stretching Functions; Modelling with Functions
• Each lesson: inquiry question, starter, key ideas, 4 criterion-tagged worked examples, a practice task from levels 1–2 to 7–8 with a model answer, exit ticket and reflection
• 5 worksheets (Word + PDF) in three level bands, with full answers
• Task 1: Criterion A test (50 minutes, 34 marks) with markscheme and marks-to-level conversion
• Task 2: Self-Inverse Functions investigation (Criteria B and C), finding and proving when (ax + b)/(cx + d) is its own inverse
• Task 3: Planning the School Trip real-life task (Criteria D and C), modelling the cost per student with rational functions
• Teacher guide: unit planner (key and related concepts, statement of inquiry, inquiry questions), lesson plans, misconceptions and grade boundaries
Why teachers use it
Each click reveals the next line of working, so students predict before you show them. Tasks come with student rubrics, checklists, model solutions and moderation notes, and everything is editable.
Part of a full course
This is Unit E4 of the 6-unit MYP 4–5 Extended course, which complements our 10-unit Standard course. Previous unit: MYP Maths Extended Vectors – Unit E3 lessons and assessment Next unit: MYP Maths Extended Further Algebra – Unit E5 with assessment. Save over 40% with the MYP Maths 4–5 Extended Course Bundle – 6 units with assessments.
Last updated: 2 November 2026 (first version). Written for the current MYP mathematics guide (first assessment 2022). Independent resource, not endorsed by the IBO.