EF Legacy International Online School · Institutional Review

Mathematics 0580: six-week teaching review pack

Source verification

Official syllabus: 2025–2027 · version 3. Read the authoritative syllabus. Summary checked against its assessment overview on 5 October 2026. Administrative zone and centre-specific entry options remain unconfirmed.

Core: Papers 1 and 3, 80 marks and 90 minutes each. Extended: Papers 2 and 4, 100 marks and 120 minutes each. Each paper contributes 50%; Papers 1/2 prohibit calculators, Papers 3/4 require a scientific calculator.

Delivery design for review

For each proposed week: one 50-minute guided lesson, one 40-minute supported practice session and approximately 60 minutes of independent work. The appointed teacher must adjust pace from the initial diagnostic, map the complete syllabus and confirm accommodations before delivery. This sample is only the opening six-week sequence.

Each guided lesson uses: 5 minutes retrieval; 10 minutes explicit modelling; 15 minutes guided practice; 15 minutes independent response; 5 minutes exit check. Keep a plain-text copy and accept agreed low-bandwidth work. Collect only authorised learner records; no live learner records are included here.

Diagnostic and support

Before week one, use the first unit’s questions without grading for certification. Record the method as well as the result. Identify a specific gap, teach one smaller example and retry a parallel question. After two unsuccessful supported attempts, the future teacher refers the learner to the academic coordinator with the work sample and the support tried. This is a proposed workflow; named staff are not yet appointed.

Week 1: Equivalent forms

Learning intention

Represent a quantity as a fraction, decimal and percentage; justify the conversion.

Teacher model and guided practice

Use a hundred-square drawn on paper. Shade 35 cells, label the fraction 35/100, simplify to 7/20 and convert to 0.35. Explain why every representation names the same quantity. Model 3/8 by division and comparison with 1/2. Have learners explain a mistaken claim that 0.35 equals 3.5%.

Original learner task

Convert 7/20 to a decimal and percentage. Order 0.6, 5/8 and 62%. Explain why 3/8 is less than 0.4.

Worked answers / EF Legacy practice marking guidance

7/20=0.35=35% (2 marks). Order: 0.6, 62%, 5/8=62.5% (3 marks). 3/8=0.375<0.4 with valid working (2 marks).

Support and extension

Use hundred-squares and written division for support; extend with recurring decimals without assuming finite conversion.

Evidence and next step

Retain the authorised work sample, annotate the specific criterion met or missed, give one actionable feedback point and check a parallel response. A mark alone does not demonstrate improvement. Log the next lesson’s adaptation.

Week 2: Ratio and proportional reasoning

Learning intention

Scale a ratio and check a proportional model against a context.

Teacher model and guided practice

Model a paint mix of blue:white=2:3 using five drawn parts. A 20-litre batch has four litres per part, hence eight blue and twelve white. Compare additive and multiplicative changes; adding equal amounts does not generally preserve the ratio. Ask what must remain constant for a price model to be proportional.

Original learner task

Split R450 in the ratio 2:3. Three notebooks cost R54 at a constant unit price; calculate the cost of five. Explain why a delivery fee prevents total price being directly proportional to notebook count.

Worked answers / EF Legacy practice marking guidance

R180 and R270 using five equal parts (3 marks). R90, with R18 per notebook (2 marks). A fixed fee adds a non-zero intercept (2 marks).

Support and extension

Provide part diagrams; extend by deriving y=kx and a contrasting y=kx+b.

Evidence and next step

Retain the authorised work sample, annotate the specific criterion met or missed, give one actionable feedback point and check a parallel response. A mark alone does not demonstrate improvement. Log the next lesson’s adaptation.

Week 3: Percentages and change

Learning intention

Calculate a percentage change and identify the correct base.

Teacher model and guided practice

Start with a R240 item and a 15% reduction. Model 15/100 of R240=R36, then R204. Explain the multiplier 0.85. Compare a reduction followed by a rise: the bases differ, so equal percentages do not cancel. Estimate the direction and magnitude before calculation.

Original learner task

Find a 15% discount on R240 and the final price. Increase R200 by 10%, then reduce the result by 10%. Explain the final difference from the original.

Worked answers / EF Legacy practice marking guidance

R36 discount and R204 final (3 marks). R220 then R198 (3 marks). The second percentage uses R220; overall decrease R2 (2 marks).

Support and extension

Use a labelled original/change/final table; extend to reverse percentages.

Evidence and next step

Retain the authorised work sample, annotate the specific criterion met or missed, give one actionable feedback point and check a parallel response. A mark alone does not demonstrate improvement. Log the next lesson’s adaptation.

Week 4: Linear relationships

Learning intention

Translate a simple pricing rule into an equation and solve for an unknown.

Teacher model and guided practice

A fictional taxi model charges R12 plus R4 per kilometre. Write C=12+4d, label variables and units, and calculate three values. Demonstrate solving 12+4d=40 by undoing operations in reverse. Discuss why this simplified rule may not model all real journeys.

Original learner task

Write the rule, find the cost at 5 km, solve for distance when cost is R40 and identify one modelling limitation.

Worked answers / EF Legacy practice marking guidance

C=12+4d (2 marks); R32 (2 marks); d=7 km (3 marks); plausible limitation such as waiting time or variable tariffs (1 mark).

Support and extension

Provide balance diagrams and operation arrows; extend to comparison of two linear models.

Evidence and next step

Retain the authorised work sample, annotate the specific criterion met or missed, give one actionable feedback point and check a parallel response. A mark alone does not demonstrate improvement. Log the next lesson’s adaptation.

Week 5: Area and measurement

Learning intention

Select an area calculation and preserve units through a compound shape.

Teacher model and guided practice

Draw an L-shaped floor as a 6 m by 4 m rectangle with a 2 m by 1 m corner removed. Calculate the large area before subtracting the cut-out. Compare a second method that splits the shape into rectangles. Ask why perimeter cannot be obtained by subtracting areas.

Original learner task

Calculate the L-shaped area. At R75 per square metre, calculate material cost ignoring waste. State one reason a real quotation could be higher.

Worked answers / EF Legacy practice marking guidance

24−2=22 m² with working (3 marks); R1650 (2 marks); allowance for waste, labour or other stated cost (1 mark).

Support and extension

Supply a labelled scale-free diagram; extend to an algebraic expression for a variable cut-out.

Evidence and next step

Retain the authorised work sample, annotate the specific criterion met or missed, give one actionable feedback point and check a parallel response. A mark alone does not demonstrate improvement. Log the next lesson’s adaptation.

Week 6: Data and explanation

Learning intention

Calculate summaries and explain what a small data set can and cannot show.

Teacher model and guided practice

Use fictional journey times 12, 14, 14, 15, 25 minutes. Model sorting, median, mean and range. Explain how the high value affects the mean while the median describes the central ordered value. Require a sentence tying the choice of measure to the question rather than declaring one measure always better.

Original learner task

Find mean, median and range. Compare with 12,14,14,15,15. Explain why neither five-value set establishes the usual journey time for an entire town.

Worked answers / EF Legacy practice marking guidance

Mean 16, median 14, range 13 (3 marks); second mean 14, median 14, range 3 (3 marks); small/context-limited sample with reason (2 marks).

Support and extension

Use ordered cards or plain text; extend by describing a fairer sampling method.

Evidence and next step

Retain the authorised work sample, annotate the specific criterion met or missed, give one actionable feedback point and check a parallel response. A mark alone does not demonstrate improvement. Log the next lesson’s adaptation.

Assessment and moderation protocol

For the six-week review sample, combine one task from weeks 1–2, one from weeks 3–4 and one from weeks 5–6. State the purpose and local rubric before use. These are original practice tasks, not Cambridge examination questions, grade thresholds or official mark schemes.

  1. The appointed teacher checks source version, skill coverage, task wording, expected answers and total marks before use.
  2. A second qualified reviewer independently checks every item and the marking guidance; unresolved items are revised before learner delivery.
  3. For a real class, moderate at least five anonymised scripts, or all scripts if fewer than five, including a range of performance. Record each difference, agreed rationale and any cohort-wide remarking decision.
  4. Return criterion-linked feedback and one improvement action. Confirm reassessment and appeal routes under adopted school policies.
  5. Store evidence under authorised staff access; record review date, reviewer, version and the next review trigger. No moderation outcome has been fabricated for this pack.

Release checklist

All four remain required before formal teaching opens. School admissions and fees remain launch-gated.