Every part, two ways
Each part of the bundle opens right here on the site, projectable in any browser, and downloads as an editable file, never a locked PDF. Adapt them to your set, your timing and your school's calendar.
Lesson plan
The 60-minute plan, with the target boards, the random-versus-systematic distinction, the combining rules, two worked examples, examiner traps and differentiation.
Worksheet and answers
Original AS questions across recall, reading uncertainties, combining uncertainties, expressing a result and reasoning, with a full worked answer key.
Slides
Your actual slides, presented right in the browser, with the live simulation linked beneath; the download is fully editable.
21st century skills activity
Rally Coach on a six-problem set, with the PIES rationale, a facilitation guide and a full teacher answer key, so it runs faithfully.
Send learners to the lesson online
This bundle pairs with the student topic page Errors and uncertainties, which carries the interactive explanation, and with the site simulation Accuracy and Precision, which plots repeated readings against a true value so learners can see precision and accuracy come apart.
Feedback at the elbow
Uncertainty work is procedural, and learners go wrong in predictable places: adding percentages for a sum, forgetting to multiply a percentage by its power, or thinking more readings cure a systematic shift. The lesson front-loads the two distinctions with the four target boards, then drills the arithmetic.
Rally Coach puts a coach at every solver's elbow, so a misapplied rule is caught the moment it appears rather than at marking. The activity ships with a six-problem set and a full teacher answer key, so it can be run faithfully.