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ÌÇÐÄVlog

Last updated

23 August 2026

zip, 1.91 MB
zip, 1.91 MB

An IB DP Physics skill pack on uncertainties (SL and HL, first assessment 2025): a rules reference, four full worked examples, three figures and 25 answered practice items.

It is the arithmetic of uncertainty, drilled on data of every kind rather than inside one experiment, so the method transfers to any data set.

The syllabus assumes this technique but no topic owns it: the IB asks for it to be practised inside the topics that need it, so this is not a taught unit of the course but a supplement to integrated teaching.

This pack is worked, not taught: the teaching duration shown is student working time across the practice bank, about 190 minutes, not classroom delivery time. It runs as four sittings, 34 to 63 minutes each.

What students learn:

  • Accuracy, precision, resolution, uncertainty, error, reliability and validity told apart, and random error against systematic error
  • Recording a reading to the resolution of its instrument: scales, digital displays, two-ended lengths, hand timing and repeated readings
  • Absolute, fractional and percentage uncertainty, converted both ways, and quoting a value to the precision its uncertainty supports
  • Propagation through sums, differences, products, quotients, powers and exact numbers, and why subtracting two close values wrecks a result
  • Percentage error against an accepted value, percentage difference between two results, and the range test that decides whether a result agrees

Where it stops: this pack is uncertainty arithmetic. Error bars, extreme gradient lines, gradient and intercept uncertainty and linearising are not covered.

Three tiers: A, six fluency tables with 76 keyed answer cells and a four-part error hunt; B, five applied items with 15 marked parts; C, three multiple-choice items with every distractor explained, and two structured questions worth 22 marks.

IB skills (Tool 3: Mathematics, with Inquiry 2 and Inquiry 3): the pack teaches the significance of uncertainties, recording them as a range, propagating them, expressing them in all three forms, percentage error, and assessing accuracy, precision, reliability and validity. Students practise mean and range, percentage difference, and identifying random and systematic errors.

What’s included:

  • Student Worksheet, 29 pages, answers stripped out, colour and B&W
  • Teacher Key, 40 pages, every answer and model solution, plus teaching notes
  • The editable worksheet as a self-contained HTML file

Worksheet and key are two projections of one source, so no answer file can drift. Grades 11-12 (ages 16-19).

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)](/teaching-resource/-13516788) - [Unit Conversion, raw readings into SI before processing (free)](/teaching-resource/resource-13537341)

£25.20

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