NCSE study materials
NCSE study resources

NCSE key terms

NCSE · Get comfortable with the vocabulary.

Main idea

The central point a passage is built to convey, which all supporting details explain or illustrate. Identifying it helps you answer summary and title questions and reject details that are true but secondary.

Related: Supporting detail, Inference
Supporting detail

A specific fact, example, or reason in a passage that backs up the main idea. Detail questions often ask you to locate one, so scan for keywords from the question rather than rereading everything.

Related: Main idea, Scanning
Inference

A conclusion drawn from evidence in the text that is not stated outright. A valid inference must be strongly supported by the passage, not merely plausible or based on your own assumptions.

Related: Main idea, Tone
Tone

The writer's attitude toward the subject, such as critical, neutral, or enthusiastic. Tone is revealed by word choice and emphasis, and tone questions usually ask you to pick the best-fitting description.

Related: Inference, Connotation
Connotation

The implied feeling or association a word carries beyond its literal meaning, as with thrifty versus stingy. Recognizing connotation helps you judge an author's attitude and choose precise wording.

Related: Tone, Context clue
Context clue

Surrounding words or sentences that help you figure out the meaning of an unfamiliar term. Examples, contrasts, and definitions embedded in the text are the most common types.

Related: Connotation, Scanning
Scanning

Moving your eyes quickly over text to locate a specific word, date, or name rather than reading every sentence. It saves time on detail and reference questions in long passages.

Related: Supporting detail, Skimming
Skimming

Reading rapidly for the general sense of a passage, often by focusing on first sentences, headings, and repeated terms. It is useful for previewing structure before answering questions.

Related: Scanning, Main idea
Transition word

A word or phrase such as however, therefore, or meanwhile that signals how two ideas connect. Noticing transitions helps you follow an argument and predict what comes next.

Related: Coherence, Main idea
Coherence

The quality of writing in which sentences and paragraphs connect logically and flow in a clear order. Coherent writing uses consistent pronouns, transitions, and a sensible sequence of ideas.

Related: Transition word, Topic sentence
Topic sentence

The sentence, usually first in a paragraph, that states the paragraph's main point. It guides the reader and is often the best place to look when locating a paragraph's purpose.

Related: Coherence, Main idea
Ratio

A comparison of two quantities by division, often written as a fraction or with a colon, such as 3:5. Ratios let you scale a relationship up or down while keeping it proportional.

Related: Proportion, Percent
Proportion

An equation stating that two ratios are equal, such as 3/4 = 9/12. Proportions are solved by cross-multiplying and are used for scaling recipes, maps, and rates.

Related: Ratio, Unit rate
Percent

A part per hundred, meaning the value is divided by 100. Percents are used for discounts, interest, and comparisons, and converting to decimals makes calculation easier.

Related: Ratio, Average
Average (mean)

The sum of a set of values divided by how many values there are. The mean is pulled toward extreme values, so it can differ noticeably from the median in skewed data.

Related: Median, Percent
Median

The middle value of a data set arranged in order, or the average of the two middle values if the count is even. It is less affected by outliers than the mean.

Related: Average (mean), Range
Range

The difference between the highest and lowest values in a data set. It is a quick measure of spread but depends only on the two extremes, so outliers can distort it.

Related: Median, Average (mean)
Unit rate

A rate expressed as an amount per single unit, such as miles per one hour or cost per one item. Unit rates make comparisons between different packages or speeds straightforward.

Related: Ratio, Proportion
Order of operations

The agreed sequence for evaluating an expression: parentheses, exponents, then multiplication and division left to right, then addition and subtraction left to right. Following it prevents inconsistent results.

Related: Rounding, Estimation
Rounding

Replacing a number with a nearby value that has fewer digits, based on the next digit. Rounding is used when an exact figure is unnecessary or when a result must match a required precision.

Related: Estimation, Order of operations
Estimation

Finding an approximate answer by rounding or simplifying numbers before calculating. It is a fast way to check whether a computed answer is reasonable and to eliminate unlikely choices.

Related: Rounding, Order of operations
Alphabetical filing

Arranging names or records in order according to the letters of the alphabet, letter by letter. Standard filing rules treat surnames first and ignore spaces in some systems, so consistency matters.

Related: Chronological order, Cross-reference
Chronological order

Arranging items by date or time sequence, earliest first or latest first as the system requires. It is used for logs, correspondence, and records where timing establishes meaning.

Related: Alphabetical filing, Cross-reference
Cross-reference

A note directing a reader from one record or index entry to another related one. Cross-references keep files findable when a document could reasonably be stored under more than one name.

Related: Alphabetical filing, Memo
Memo

A brief internal written message with a heading identifying sender, recipient, date, and subject. Memos are concise and usually state a purpose, key facts, and any action required.

Related: Cross-reference, Active listening
Proofreading

Checking written text for errors in spelling, grammar, punctuation, and formatting before it is finalized. Careful proofreading catches mistakes that change meaning or undermine a professional impression.

Related: Memo, Active listening
Active listening

Giving full attention to a speaker, then confirming understanding by paraphrasing or asking clarifying questions. It reduces misunderstandings and shows the other person that their message matters.

Related: Paraphrasing, Empathy
Paraphrasing

Restating another person's message in your own words to confirm you understood it correctly. It is a core customer-service technique for checking accuracy before acting on a request.

Related: Active listening, Empathy
Empathy

Recognizing and acknowledging another person's feelings without necessarily sharing them. In service settings, expressing empathy calms frustration and builds trust before you solve the problem.

Related: Active listening, De-escalation
De-escalation

Techniques that reduce tension in a heated interaction, such as speaking calmly, listening fully, and avoiding blame. De-escalation keeps a conversation productive so the underlying issue can be resolved.

Related: Empathy, Confidentiality
Confidentiality

Protecting private information from being shared with people who are not authorized to receive it. It requires verifying identity and sharing only the minimum necessary for the task.

Related: De-escalation, Active listening
Root cause

The underlying reason a problem occurs, as opposed to its visible symptom. Fixing the root cause prevents recurrence, while treating only the symptom usually allows the problem to return.

Related: Cost-benefit analysis, Prioritization
Cost-benefit analysis

Comparing the expected advantages of an option against its drawbacks and costs. It helps decision makers choose among alternatives when resources are limited and trade-offs are unavoidable.

Related: Root cause, Prioritization
Prioritization

Deciding the order in which tasks or problems should be handled, usually by urgency and impact. Clear priorities keep high-consequence work from being crowded out by low-value activity.

Related: Root cause, Cost-benefit analysis
Spreadsheet cell

The box at the intersection of a row and column where data is entered, identified by a column letter and row number such as B4. Cells hold values, text, or formulas.

Related: Formula, Sort
Formula

An instruction in a spreadsheet that calculates a result from cell references or numbers, beginning with an equals sign. Formulas update automatically when the referenced values change.

Related: Spreadsheet cell, Sort
Sort

Rearranging rows of data into a chosen order, such as alphabetical by name or ascending by date. Sorting makes records easier to review but can scramble related rows if the range is incomplete.

Related: Spreadsheet cell, Data validation
Data validation

A rule that restricts what can be entered into a field, such as a list of allowed values or a date range. It reduces data-entry errors at the point of input rather than after the fact.

Related: Sort, Formula