A complete IB DP Physics skill pack on significant figures and rounding (SL and HL, first assessment 2025), offered free as a full-quality sample of the premium YPhysics catalogue: a rules reference, six worked examples and more than 60 practice questions, all answered. Not a cut-down teaser but the whole pack, nothing watermarked and nothing held back.
Significant figures are a technique the syllabus assumes but no topic owns, and the IB asks for it to be practised inside the topics that need it. This is not a taught unit: it is reference and remedial material that supplements integrated teaching, for the first weeks or for a student losing marks on precision rather than physics.
This pack is worked, not taught: the 2 hours shown is student working time across the practice bank, not classroom delivery time. It sits as two sittings of about an hour.
What students learn:
- Counting significant figures and decimal places, every kind of zero included, and the ambiguous 55 000
- Rounding once from the original value, including a carried 9: 0.00030990 to 3 s.f. is 0.000310
- Reading the answer back: 99.997 to 3 s.f. is 100, which claims one figure, so write 1.00 x 10^2
- Decimal places for addition and subtraction, significant figures for multiplication and division
- Stating a mean to the precision the instrument supports (2.30 s, trailing zero kept)
Three tiers: A, 35 fluency items, two sets inverted so students build a number to a stated condition; B, 16 applied calculations on speed, density, momentum, energy and g from a pendulum; C, four multiple-choice items, every distractor explained, and two structured questions worth 18 marks.
IB skills (Tool 3: Mathematics): the pack teaches expressing a quantity to an appropriate number of significant figures or decimal places; students practise basic arithmetic and algebraic calculation and scientific notation.
What’s included:
- Student Worksheet (15 pages), answers stripped out, colour and printer-friendly B&W
- Teacher Key (23 pages), every answer and model solution, plus teaching notes
- The editable worksheet, a self-contained HTML file
The worksheet and the key are two projections of one source, so no answer file can drift. Grades 11-12 (ages 16-19).
Part of the A.1 Kinematics Complete Unit Bundle: every pack for the topic, 30% off buying them separately.
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