Build a search signal
Reduce the question to a name, date, number, technical term, cause or scope word.
IELTS Academic Reading · Skill lesson
Scanning: locate evidence without rereading the whole passage
Turn a question into searchable signals, find the likely evidence zone and read around the match before you commit to an answer.
Short answer: Scan only after you know what you are looking for. Search for a distinctive name, number, term or paraphrase, then read the full sentence and its immediate context.
What this skill changes
Use it with a clear purpose
A useful reading skill changes what you notice, what you ignore and how you prove an answer.
Recognise paraphrase
Expect the passage to express the same idea with different vocabulary or grammar.
Control context
Read around the match so a nearby detail does not become a false answer.
WeLearn method
A repeatable process, not a shortcut
Follow these steps until the sequence becomes automatic under time pressure.
Underline the target
Identify what the question truly asks: person, time, reason, change, quantity or location.
Predict its form
Decide whether the evidence is likely to be a number, noun phrase, comparison or causal statement.
Move through the likely zone
Use your passage map and scan visually for the signal or a close paraphrase.
Read and verify
Read one sentence before and after the match, then test scope, polarity and word limit.
Worked contrast
See the difference before you practise
Weak move
Starting again at Paragraph A every time a question asks for one date, name or local detail.
Strong move
Turn ‘When did the pilot expand?’ into the signals pilot + expand + date, scan the likely results paragraph, then read around the matching year.
Guided practice
Apply the method with immediate feedback
Make a decision first. Then use the explanation to compare your reasoning with the evidence.
Guided practice · three evidence decisions
Cooling a city block
Plan the search first. The evidence decision stays locked until you have checked a distinctive signal.
Passage
Cooling a city block
Paragraph A
A city does not heat evenly. Dark roofs, roads and other developed surfaces absorb and hold more solar energy than many rural surfaces. Buildings can also slow the release of heat after sunset. The result is a temperature difference both between city and countryside and between neighbourhoods inside the same city.
Paragraph B
Trees and other vegetation cool streets in two connected ways. Their leaves shade walls and pavements, so those surfaces receive less direct sunlight. Plants also release water through evapotranspiration, a process that uses heat from the surrounding air. The benefit therefore comes from both shade and evaporation, not from greenery as decoration.
Paragraph C
Where planting space is scarce, a building owner can change the roof surface. A cool roof reflects more sunlight and releases absorbed heat more effectively than a conventional roof. This can reduce roof and indoor temperatures without rebuilding the entire property, although the result depends on climate, insulation and roof design.
Paragraph D
Before spending money, planners need to know where heat exposure and missing shade overlap. A canopy survey can show which streets lack trees, while surface and building data reveal where a roof programme may have the greatest effect. A citywide average is less useful than a map that identifies blocks with different needs.
Paragraph E
No single measure fits every block. Young trees need water and long-term care; green roofs can cost more to install; reflective roofs work differently across climates and building types. A practical heat plan therefore combines methods according to local space, budget and maintenance capacity, then checks whether the intended neighbourhoods actually benefit.
01Search plan → evidence
Which surfaces absorb and retain more solar energy?
1 · Choose the most distinctive signal
02Search plan → evidence
What two processes produce the cooling benefit?
1 · Choose the most distinctive signal
03Search plan → evidence
What can an owner change when planting space is limited?
1 · Choose the most distinctive signal
Source boundary: Original WeLearn passage grounded in EPA explanations of heat islands, vegetation and cool roofs. Review the primary source (opens in a new tab).
Independent practice
Transfer the method to a new passage
Complete the full set before feedback opens. This checks whether the process survives without step-by-step prompting.
Full passage · feedback closed
0/5 locatedRestoring mangroves after storms
Locate all five evidence spans before submitting. Options are passage excerpts, not answer keys.
Passage
Restoring mangroves after storms
Paragraph A
Mangrove decline was already a concern in parts of Puerto Rico, but consecutive hurricanes made the risk impossible to ignore. Damaged forests left coastal communities with less natural protection and weakened habitat. The storms did not create every problem; they transformed a gradual loss into an urgent restoration programme.
Paragraph B
A healthy mangrove forest does more than occupy the shoreline. Dense roots interrupt moving water and reduce wave energy, while branches and leaves help break the force of wind. The forest is therefore a flexible natural barrier that can lessen erosion, flooding and storm damage for areas behind it.
Paragraph C
Planting seedlings is not always the first useful step. Roads, debris or altered channels may prevent tides from reaching damaged ground in the right pattern. Restoration teams can begin by reopening water routes and improving site conditions. New trees then have a better chance to establish rather than being placed into a system that still cannot support them.
Paragraph D
The project also depends on people who live near the restoration area. Local labourers and volunteers can clear channels, plant trees and monitor recovery. When young participants receive training and paid experience, environmental work becomes a route into employment as well as a way to rebuild the coast.
Paragraph E
Storm protection is only one reason to recover a mangrove forest. The habitat can support fish and birds, store coastal carbon and contribute to recreation and tourism. Evaluation should therefore examine ecological and community outcomes over time, rather than treating the shoreline as a single-purpose defence structure.
Evidence decision
What transformed gradual decline into an urgent programme?
Search plan: transformed + urgent
Evidence decision
Which part of a mangrove interrupts moving water?
Search plan: interrupt + moving water
Evidence decision
What may restoration teams reopen before planting?
Search plan: before planting + reopen
Evidence decision
What can environmental work become for trained young participants?
Search plan: young + paid experience
Evidence decision
Which coastal benefit is stored rather than supported?
Search plan: store + coastal
One complete submissionRead around every match; nearby true information can still answer a different question.
Source boundary: Original WeLearn passage grounded in NOAA reporting on restoration, coastal protection and community partnerships. Review the primary source (opens in a new tab).
Independent protocol
Repeat the set without weakening the evidence rule
- Take six question stems and underline one high-value search signal in each.
- Predict the grammatical form of each answer before returning to the passage.
- Locate the signal or paraphrase and record the exact evidence sentence.
- Reject any answer you cannot support with a precise span of text.
Mastery check
You are ready to move on when…
- you convert a question into a concrete search signal
- you distinguish similar numbers or names that answer different questions
- you look for paraphrase when an exact word match is absent
- you read around the match before selecting an answer
WeLearn Progress Engine
Locate exact proof across six levels
Two decision drills lead into four complete evidence sets. Drafts, time, scores and review targets stay on this device.
0/6levels mastered
0 targets in review
0:00 current attempt
Loading draft and progress
Level 1 of 6 · Question → search plan
Build a distinctive signal
Choose the smallest signal pair that is distinctive enough to locate the requested relationship.
3/4to master
01What sleep does to a new memory · search signal
What happens to newly formed memories during sleep?
02When the public joins a research team · search signal
Which device can volunteers use to report rain or snow?
03Keeping a seed collection useful · search signal
When do staff test stored samples?
04Rebuilding cross-border night rail · search signal
What may complicate passenger protection during disruption?
Source boundary: Original WeLearn passage grounded in current NIMH explanations of sleep, memory reactivation and separation between newer and older memories. Review the primary source (opens in a new tab).
Guided Learn mode delivers evidence and explanations to this browser. It is not a secure Practice, Exam or proctored mode.
Review and sources
How this Scanning lesson was reviewed
This material was reviewed in August 2026 to keep the official IELTS Reading format separate from the WeLearn learning strategy used on this page.
Review focus
- The lesson separates locating a signal from verifying the complete evidence window.
- Distractors test entity, number, scope, polarity and nearby-detail errors rather than random vocabulary.
- Scanning is labelled as a WeLearn reading strategy, not a standalone official IELTS task.
Sources used
Official IELTS Academic Reading format: Used to distinguish official task families from the WeLearn evidence-location method.
WeLearn practice blueprint: Defines guided signal selection, independent transfer, progression and persistent review.
Scope: these WeLearn exercises support academic-reading practice. They are not official IELTS questions and do not predict a band score by themselves.
FAQ en español
Preguntas frecuentes
Esta es la única sección de la lección que se conserva en español.
¿Qué es scanning en IELTS Reading?
Scanning es leer buscando una pieza específica de información: nombre, fecha, cifra, término técnico, sinónimo o frase equivalente. Sirve para localizar evidencia antes de responder.
¿En qué se diferencia scanning de skimming?
Skimming busca la idea general y la función de cada párrafo. Scanning busca una ubicación exacta dentro del texto para confirmar una respuesta con evidencia.
¿Scanning sirve para todos los tipos de pregunta IELTS?
No resuelve todo por sí solo, pero ayuda mucho en Matching Information, Sentence Completion, Summary Completion, Diagram Labeling y Short Answer porque esas tareas dependen de localizar evidencia rápido.
Continue your Reading pathway
Turn the skill into exam decisions
Scanning is a WeLearn evidence-location strategy, not a separate official IELTS task. It is especially useful for Matching Information, completion tasks, diagram labels and short answers.
- Official IELTS Academic Reading format — used to distinguish official task types from WeLearn strategy training.
- WeLearn original guided practice — explanations and distractors are designed for skill transfer, not copied from official questions.