Constancy is a lack of change in some quantity, feature, or object. It may describe an unchanging quantity, like the speed of a car or the slope of a ramp.
Constancy is a state of consistent equality, where an unchanging value or feature remains equal to its past state over time.
The seed of constancy might be called on in many contexts in algebra, including understanding constant terms in polynomials and constant slope in linear functions.
Children might use phrases or descriptors like “stays the same,” “not changing,” or “steady” when talking about constancy.
Children may use gestures like moving their hand horizontally (or upwards/downwards at a constant slope) to indicate something remaining the same over time.
Students may note when something “stays the same,” or “remains constant .
Children may describe things as not changing over time or staying stable.