Author note — to cover (Higher)

Higher only, per the A4 braces on algebraic fractions. Factorise numerator and denominator before cancelling, with common factors up to quadratics, e.g. (x² − 9)/(x² + 5x + 6); name the crime of cancelling terms across a plus sign. Adding, multiplying and dividing are the sibling pages. (A4)

• Fluency — direct questions on simplifying an algebraic fraction, limited to this lesson's stated scope (4 questions).
• Application — use the same skill in unfamiliar or contextual questions without introducing a later method (4 questions).
• Check — questions built around the exclusions and likely misconceptions named in the lesson brief (4 questions).