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Concepts

Ideas, terms, and mechanisms explained clearly.

A young student displaying a collection of her artwork, the kind of cumulative work sampling used in portfolio assessment

Portfolio assessment

Portfolio assessment is a method of evaluating student learning by collecting a purposeful selection of a student’s work over time, rather than relying on a single test or assignment to represent what they know and can do. A portfolio typically includes drafts, finished pieces, and sometimes the student’s own reflection on their growth, allowing both

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A method of evaluating learning by collecting a student's work over time rather than relying on a single test.

A kitchen scale used to measure accurate food portions

Portion Control

Portion control is the practice of managing how much food is served or consumed at a given meal or snack, used both as a weight management strategy and as a broader tool for balanced nutrition. It is distinct from a serving size, which is a standardized reference amount used for labeling, since an actual portion

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The practice of managing how much food is served or consumed at a meal or snack, distinct from a labeled serving size.

A cleanup and rebuilding crew working after a hurricane

Post-Disaster Reconstruction Security

Security Challenges During Extended Recovery While initial disaster response typically lasts days to weeks, reconstruction and recovery can extend for months or even years, creating a distinct and often underappreciated security challenge compared to the immediate emergency period. Construction sites holding valuable building materials, tools, and heavy equipment become attractive targets for theft, particularly in

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Post-disaster reconstruction security addresses the protection of rebuilding efforts, construction sites, and recovery funding from theft, fraud, and disruption during the long recovery period after a major disaster.

Brain regions implicated in post-traumatic stress disorder

Post-traumatic stress disorder

Post-traumatic stress disorder, commonly abbreviated as PTSD, is a mental health condition that can develop after a person experiences or witnesses a deeply distressing or life-threatening event, such as combat, a serious accident, assault, or a natural disaster. While many people experience some distress after a traumatic event, PTSD is diagnosed when specific symptoms persist

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A mental health condition that can develop after experiencing or witnessing a deeply distressing or life-threatening event.

A red public post box on a street wall

Postal voting

In simple terms Postal voting is a way of casting a ballot without going to a polling station. The election office posts the ballot to the voter, who fills it in and sends it back. International IDEA defines it as those measures that allow voters to submit their ballot by physical post to the election

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Postal voting lets a registered voter mark a ballot at home and return it by mail instead of visiting a polling station.

The Portland Building, a 1982 postmodern office building by Michael Graves

Postmodern architecture

Postmodern architecture is a style and movement that emerged in the 1960s as a direct reaction against modern architecture, especially the austere, ornament-free International Style, reintroducing historical reference, color, humor, and complexity that modernism had deliberately stripped away. It flourished through the 1980s and 1990s before gradually splintering into several successor tendencies by the late

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A 1960s-1990s architectural movement that reintroduced ornament, color, and historical reference as a reaction against modernism.

A chicken inside a poultry farm barn

Poultry Farming

Divergent Paths for Meat and Egg Production Modern poultry farming has developed along two largely separate tracks: broiler production, raising chickens specifically selected and managed for rapid growth and meat yield typically harvested within weeks of hatching, and layer production, managing hens bred and fed specifically to sustain egg production over an extended laying period

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Poultry farming is the raising of domesticated birds, primarily chickens, turkeys, and ducks, for meat and egg production on both commercial and small-scale operations.

High-voltage power lines carrying electricity across the national grid

Power grid

The power grid is the interconnected network of generating stations, transmission lines, substations, and distribution wires that produces electricity and delivers it to homes, businesses, and factories. Grids operate as a continuously balanced system: the amount of electricity generated at any instant must closely match the amount being consumed, since electricity cannot be stored in

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The interconnected network of power plants, transmission lines, and distribution wires that generates and delivers electricity.

Tilt-up concrete construction, a form of precast concrete cast flat on site and tilted into place

Precast Concrete

Precast concrete is concrete that is cast and cured into finished structural or architectural components at a factory or dedicated casting yard before being transported to a construction site for assembly, rather than being poured and cured in place as part of the building itself. The approach reverses the usual sequence of concrete construction: instead

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Concrete cast and cured into finished structural components at a factory before being transported to a site for assembly.

Predictive maintenance monitoring equipment used to anticipate failures before they occur

Predictive Analytics

Predictive analytics is the use of historical data, statistical techniques, and machine learning methods to make informed estimates about future events or outcomes that have not yet happened. Rather than only describing what has already occurred, which is the role of simpler descriptive analytics, predictive analytics builds models trained on patterns found in past data

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The use of historical data and statistical or machine learning techniques to estimate future events or outcomes.