Bounds and Error Intervals | Complete GCSE Maths Lesson | Year 10 Year 11 Higher
A complete, ready-to-teach Power Point lesson on bounds and error intervals for Higher Tier, suitable for KS 4. Compatible with all exam boards.
This fully structured 1 hour lesson takes students from rounding to writing error intervals and calculating with upper and lower bounds. It follows the I Do / We Do / You Do teaching sequence, with a starter and exit ticket included.
What is included (editable slides):
Starter activity on rounding and inequality notation
Language of bounds: lower bound, upper bound, degree of accuracy, error interval, with a number-line visual
A clear 4-step method
5 worked I Do examples covering nearest unit, nearest ten, decimal places, significant figures and the upper bound of an area
5 We Do questions with hints
5 mini white board check for understanding questions, including a spot the mistake task
Differentiated You Do task in 5 tiers (Starter, Bronze, Silver, Gold, Challenge) with full model answers
Exit ticket with 3 exam-style questions and mark scheme
Teacher notes on every slide covering common misconceptions
Topics covered: rounding, upper and lower bounds, error intervals, inequality notation, decimal places, significant figures, nearest ten/hundred, and calculating bounds for area, perimeter, subtraction and speed.
Ideal for: first teaching, revision, cover lessons, observations and intervention sessions.


