zip, 1.97 MB
zip, 1.97 MB

IB DP Physics skill pack on proportionality and scaling: SL and HL, first assessment 2025. Six modelled examples, five figures and 30 answered questions.

The IB asks for these techniques to be practised inside the topics that need them, so this is a supplement to integrated teaching and not a taught unit of the course. It is reference and remedial material for a technique the syllabus assumes but no topic owns, and it earns its place with a class that substitutes correctly and still cannot say what trebling the radius does to the force.

This pack is worked, not taught: the 220 minutes shown is student working time across the practice bank, not classroom delivery time. It splits into three sittings of about 75, 70 and 75 minutes, marked on the page.

Where it stops: the constant is read straight off a gradient, without the best-fit lines and the uncertainty a Paper 1B analysis puts on it.

What students learn:

  • Stating a proportionality, and whether it is positive, negative or neither
  • Scaling by the ratio method, as a factor or a percentage, and backwards
  • Rearranging before reading the power, and scaling two changes at once
  • The shape each relationship draws, and how to sketch it
  • Straightening a curve by choosing what to plot, and what its gradient equals

Three tiers: A, five fluency items, four drill tables, 28 rows, 67 answers; B, twelve applied items, 32 lettered parts; C, four multiple-choice items, every option explained, and three structured questions worth 34 marks.

IB skills (Tool 3: Mathematics). Taught: direct and inverse proportionality, with positive and negative relationships; the effect of a change in one variable on another; sketching graphs with labelled but unscaled axes. Practised: selecting and manipulating equations; ratios, reciprocals and exponents; arithmetic and algebra; linearizing graphs where appropriate; interpreting graph features.

What’s included (6 files):

  • Student Worksheet, 30 pages, answers stripped out, colour and B&W
  • Teacher Key, 42 pages, every answer, 21 worked solutions and teaching notes
  • The editable worksheet, a self-contained HTML file
  • READ ME FIRST guide with the licence

Worksheet and key are two projections of one source, so no answer file can drift. Opens in any browser, nothing to install, worksheet editable. It declares no topic and no understanding, deliberately: this belongs to the IB skills in the study of physics. Grades 11-12 (ages 16-19), as homework, reference or revision.

Related resources:

Get this resource as part of a bundle and save up to 30%

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

Bundle

IB DP Physics (2025) IA and Paper 1B Skills Bundle Complete

IB DP Physics skills bundle for the internal assessment and Paper 1B, SL and HL, first assessment 2025: eight skill packs, 30% off buying them separately. The internal assessment is 24 marks and 20% of the course, marked on four criteria; Paper 1B is the data-based questions, 20 marks at SL and at HL. A teacher looking for either has had nowhere single to send a student. This is that place: one investigation, design to evaluation, in eight packs. **What's in the bundle, in working order** - Designing the Investigation: research question, variables, method, safety (IA Criterion 1) - Significant Figures and Rounding: the number to the right figures (free) - The Units of a Quantity: SI base and derived units, homogeneity checks (free) - Uncertainties: recording a range, propagating it, percentage error - Tables, Charts and Graphs: the results table, the plot, the best-fit line - Proportionality and Scaling: the relationship read out of processed data - Uncertainties on a Graph: bars, extreme lines, gradient and intercept uncertainty - Concluding and Evaluating: the conclusion and the evaluation **What this bundle is, and what it is not** The IB asks these skills to be practised inside the topics and investigations that need them, so no pack here is a taught unit of the course. It is reference, remedial and revision material that supplements integrated teaching. The packs are worked, not taught: the 31 hours across the eight is student working time through the practice banks, not classroom delivery time. **Every pack includes: ** - A student worksheet, answers stripped out, colour and black-and-white PDF - A teacher key, every item answered, projected from the same source so it cannot drift - The editable worksheet, a self-contained HTML file 247 student pages and 355 teacher pages across the eight, every question answered. **IB skills in the study of physics, mostly Tool 3: Mathematics with Inquiry 1, 2 and 3**: research questions, variables, methodology and safety; significant figures and SI units; recording and propagating uncertainties; tables, plotting and best-fit lines; proportionality; uncertainty bars, extreme gradients, gradient and intercept uncertainty; justifying conclusions and evaluating improvements. Every pack opens in any browser with nothing to install, and the worksheets are editable. SI units, IB notation and IB command terms throughout. Two of the eight are free, so a pack can be worked before buying. Grades 11-12 (ages 16-19). **Also in the catalogue, sold separately:** - [Measuring the Acceleration of Free Fall, a worked investigation to practise on (free)](https://www.tes.com/teaching-resource/-13516788) - [Unit Conversion, raw readings into SI before processing (free)](https://www.tes.com/teaching-resource/resource-13537341)

£25.20

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