Yishun English Tuition for Commonwealth Secondary School is retained as a historical 2019 page title. The renewed article focuses on data commentary and trend language. Families searching for Secondary English tuition in Yishun, chart description, data interpretation, critical reading, summary, analytical writing, SEC English and small-group English tuition often see students copy numbers without explaining patterns—or describe a pattern correctly but make a causal claim the data cannot support.
Data commentary requires language for increase, decrease, stability, fluctuation, comparison, proportion, rate and uncertainty. Rose from 20 to 30 is an absolute increase of 10 units but a relative increase of 50%. Remained broadly stable differs from did not change. Was associated with differs from caused. Strong writing makes the quantitative relationship visible without exaggeration.
This page owns one learning job: turning tables and charts into precise prose while keeping scope and causation under control.
Archive note: this school/programme label is preserved only because it belongs to the historical page title and URL. eduKate is independent of the named school and does not claim affiliation, endorsement, access to internal materials or a current school-specific programme.
Read the Title and Axes
Before describing a trend, identify what is measured, the units, the population and the time period.
Absolute Change
30 minus 20 equals an absolute increase of 10 units.
Relative Change
An increase from 20 to 30 is 50% relative to the starting value.
Percentage Points
A rise from 20% to 30% is 10 percentage points, not a 10% relative increase.
Increase
Useful verbs include rose, increased, grew and climbed; choose neutral wording unless the rate justifies stronger language.
Decrease
Fell, declined and decreased are neutral; plunged or collapsed make stronger evaluative claims.
Stability
Remained stable means little or no meaningful change, not necessarily zero movement.
Fluctuation
Fluctuated means movement up and down rather than one-direction change.
Peak
Peaked identifies a highest point within the stated period.
Trough
Reached a low or bottomed out identifies a lowest point; context and register decide phrasing.
Plateau
Levelled off describes slowing change into a relatively stable period.
Gradual Change
Gradually suggests small or steady change over time.
Sharp Change
Sharply or rapidly should be used only when the data genuinely show a pronounced change.
Approximation
About, roughly and approximately signal that the figure is not exact.
Range
Between 20 and 25 identifies a bounded range.
Proportion
Half, one third, 40% and a majority describe different quantitative relationships.
Majority
A majority means more than half, not simply the largest group.
Plurality
The largest group may still be less than half; use largest share rather than majority when appropriate.
Comparison
Higher than, lower than, roughly twice, similar to and nearly equal support clear comparison.
Baseline
A change can sound dramatic depending on the starting point. Always inspect the baseline.
Rate Versus Total
A high rate can coexist with a lower total if populations differ.
Per Capita
Per-person rates allow comparison across populations of different sizes.
Correlation
Two lines moving together do not prove one causes the other.
Lag
One variable may change before another; timing matters in causal interpretation.
Confounder
A third factor may influence both observed variables.
Sample
Ask how many observations or participants produced the data.
Representativeness
A sample can be large but still unrepresentative.
Missing Data
Gaps can affect interpretation; do not assume omitted values follow the visible trend.
Scale
A truncated axis can exaggerate visual differences.
Dual Axis
Charts using two vertical axes can create misleading visual alignment.
Aggregation
Average values can hide subgroup differences.
Data Commentary Laboratory
A chart rises from 20 to 30, stays near 30 for two years, then falls to 24. Write: ‘The figure increased by 10 units, remained broadly stable around 30, then declined to 24.’ Do not invent a reason unless the source provides one.
Fictional Learner
Mira sees two variables rise together and writes that one caused the other. Her tutor asks for a mechanism or controlled comparison. She revises to ‘was associated with’ until stronger evidence is available.
A 90-Minute Lesson
Use 10 minutes for axes/units, 15 for trend verbs, 15 for percentage change, 15 for comparison, 15 for uncertainty/causation, 15 for paragraph writing and 5 for transfer.
Independence Test
Give a fresh chart containing one rise, one plateau, one fluctuation and one misleading visual scale. Ask the student to write a neutral commentary and identify which causal claims cannot be made.
Larger Goal
Strong data commentary makes relationships clear while refusing to turn a picture of numbers into a story the evidence has not earned.
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