| Word | Definition | |
| Algebraic Expression | A group of numbers, symbols, and variables that express an operation or a series of operations | Display |
| Angle Bisector | A ray that separates an angle into two congruent angles | Display |
| Annexing Zeros | Adding zeros after the whole number in the dividend so that there is no remainder or in order to arrive at a more accurate quotient | Display |
| Back-to-Back Stem and Leaf Plot | A way of displaying two large sets of data. Back-to-back stem and leaf plots allow for the display of two sets of related data for comparison purposes | Display |
| Benchmarking | Relating an estimate to a referent or benchmark. Benchmarking is used as a method for estimation | Display |
| Coefficient | A numerical factor in a term of an algebraic expression | Display |
| Compatible/friendly Numbers | A pair of numbers that are easy to work with mentally | Display |
| Compose/Decompose | The ability to take apart and put together. Can refer to number, time, shape or money. Compose/Decompose used interchangeably | Display |
| Composite Figure | A figure made up of two or more figures | Display |
| Coordinate Plane | A two-dimensional system in which a location is described by its distances from two intersecting, usually perpendicular, straight lines called axes | Display |
| Deductive Reasoning | The process of reasoning where specific cases are tested against a specific rule | Display |
| Equation | A statement that two mathematical expressions are equal | Display |
| Equiangular Triangle | A triangle in which all angles are equal | Display |
| Equilateral Triangle | A triangle in which all sides are congruent | Display |
| Event | A possible result or outcome in probability. A subset of a sample space | Display |
| Experimental Probability | A statement of probability based on a number of trials. | Display |
| Explore | The expectation that children will have the opportunity to use manipulatives, other materials, and pictures to understand mathematical concepts. Exploration and invention are parts of the learning cycle. In the Exploration phase, children are exploring concepts and beginning to discover relationships. | Display |
| Explore/Invent | The expectation that children will have the opportunity to use manipulatives, other materials, and pictures to understand mathematical concepts. Exploration and invention are parts of the learning cycle. In the Exploration phase, children are exploring concepts and beginning to discover relationships. In the Invention phase, children begin to invent the concept. | Display |
| Expontential Form | A way of writing a number using exponents | Display |
| First Quadrant | One of the four sections of a coordinate grid. The northeast region, the coordinates of which are all positive | Display |
| Frequency Table | A table that shows how often each item, number, or range of numbers occurs in a set of data | Display |
| Function | A set of ordered pairs such that for any first number (the input) there is only one possible second number (the output) | Display |
| Function Table | A table that lists pairs of numbers that show a function | Display |
| Growing Pattern | A pattern in which the interval in the pattern increases by some value | Display |
| Independent Events | Two events in which the outcome of the first event does not affect the outcome of the second event | Display |
| Inductive Reasoning | Making a generalization from specific cases. Used whenever you formulate a general rule after considering a pattern | Display |
| Inequality | A mathematical sentence that compares two unequal expressions using one of the symbols <, >, â¤,⥠| Display |
| Integer | The set of whole numbers and their opposites. | Display |
| Interval | On a graph, the distance between numbers from one grid line to another | Display |
| Isoceles Triangle | A triangle in which two sides are congruent | Display |
| Line Graph | A graph used to show change over time with points connected by line segments. x-axis represents time intervals | Display |
| Linear Equation | An equation whose graph in a coordinate plane is a straight line | Display |
| Linear Relationship | Sometimes called a linear function, it is a relationship between 2 variables which produces a line. | Display |
| Measures of Central Tendency | Value intended to indicate the typical value in a collection of data | Display |
| Mixed Decimal | A decimal number with an integer part and a decimal part | Display |
| Number Combinations | The single-digit addition and multiplication pairs and their counterparts for subtraction and division. Historically referred to as math âfacts.â | Display |
| Number Sentence | An equation or inequality with numbers | Display |
| Numeric Expression | An expression that names an amount | Display |
| One Week Calendar | A seven pocket chart that is a concrete, generic representation of one week | Display |
| Order of Operations | Rules describing what sequence to use in evaluating expressions | Display |
| Outcome | One of the possible events in a probability situation. Each of the possible results of an experiment | Display |
| Parallelogram | A quadrilateral with two pairs of parallel and congruent sides | Display |
| Perpendicular Bisector | A line that divides a line segment into two congruent segments and intersects the segment forming right angles | Display |
| Prism | A three-dimensional figure that has two congruent and parallel faces that are polygons. The remaining faces are parallelograms. The type of prism is determined by its base (rectangular, triangular). | Display |
| Pyramid | A three-dimensional shape whose base is a polygon and whose other faces are triangles that share a common vertex. A pyramid is named by its base. | Display |
| Range | 1. The difference between the greatest number and the least number in a set of numbers 2. The span from the least to greatest data points | Display |
| Ratio | A comparison of two numbers or quantities | Display |
| Rational Number | Any number that can be written as a fraction | Display |
| Repeating Pattern | A design or sequence that is quantitatively predictable because some aspect of it repeats | Display |
| Rhombus | A parallelogram with all four sides equal in length | Display |
| Sample Space | A sample space is the list of all possible outcomes in an experiment | Display |
| Sampling | A small part selected as a sample for inspection or analysis | Display |
| Scalene Triangle | A triangle where no sides are congruent | Display |
| Similar | Figures that have the same shape, but not necessarily the same size. Corresponding angles of similar shapes are congruent. Corresponding sides of similar shapes are proportional. In the example below at left, AB : DE as BC : EF. | Display |
| Simple Event | An experimental outcome that cannot be broken down any further. It is a subset of a sample space. | Display |
| Theoretical Probability | The ratio of the number of ways an event can happen to the total number of outcomes | Display |
| Three-dimensional Shape | A figure that occupies more than one plane | Display |
| Two-dimensional Shape | A figure that lies in a single plane | Display |
| Variable | 1. A quantity that changes or that can have different values 2. A symbol, usually a letter, that can stand for a variable quantity | Display |