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MY CHILD IN SCHOOL

MY CHILD IN SCHOOL – Informed Parent, Involved Parent

**2-D shapes**

Two dimensional (2-D) shapes are figures such as circles, squares and triangles that have two measures

(e.g. length, width, or height)

**3-D objects**

Three dimensional (3-D) objects are also called solid objects. They are objects such as prisms, pyramids, cylinders and cones that have height

**Math fact** or **fact** or **facts**

An addition fact is when two single digit numbers are added together. Addition facts include sums up to 9 + 9.**
(**e.g. 10 + 7 = 17)

A subtraction fact is the subtraction of a single digit number from 18 or less. Subtraction facts include differences up to

18 – 9. (e.g. 15 – 6 = 9)

Doubles are addition facts where the two numbers added together are the same. (e.g. 1+1, 7+7)

A multiplication fact is when two single-digit numbers are multiplied together up to 9 x 9. (e.g. 3 X 7 = 21, 9 X 8 = 71)

**Grade 2 Math facts**

Adding and subtracting to 10; doubles to 9+9, and related subtraction facts

**Representing Numbers**

Representing numbers is when pictures, drawings, symbols, or actual objects are used to show or stand for numbers.

**Strategy
**A method or system of steps used to solve problems. Several examples of strategies are: drawing a picture or graph, looking for a pattern, using a process of elimination, using trial and error, and applying mental math and estimation strategies.

**Equation
**A mathematical sentence stating that two expressions are equal. An equation contains an equal sign (=).

(e.g. 3+ 4= 7)

**Algebraic expression
**A mathematical phrase that is written using one or more variables and constants. (e.g., 3y + 6)

**double bar graphs
**A graph that uses pairs of bars to compare and show the relationship between data.

**Capacity
**Total amount of fluid (liquid or gas) in a container, usually measured in the metric unit of liter (L) or milliliter (mL). Example: a 500 mL container of milk.

**Strategy
**A method or system of steps used to solve problems. Several examples of strategies are: drawing a picture or graph, looking for a pattern, using a process of elimination, using trial and error, and applying mental math and estimation strategies.

**Equation
**A mathematical sentence stating that two expressions are equal. An equation contains an equal sign (=). (e.g. 3+ 4= 7)

**Expression
**A mathematical representation containing numbers, variables, and/or operation symbols; an expression does not include a relational symbol (<, >, =, ≠ ). Examples: (5 + 2) — 27 ÷ 3 (arithmetic/numerical expression) 2a + 3b (algebraic/symbolic expression)

**Factors
**A number or expression that is multiplied by another to yield a product (e.g., a factor of 24 is 8 because 8 × 3 = 24, and a factor of 3n is n because 3 × n = 3n).

**Mental math
** Mathematics done “in the head”, either in whole or in part.

**Multiples **

The product of a given whole number and any other whole number. (e.g. 18 is a multiple of 6 since 6 × 3 = 18)

**mm, cm, and m
**Metric units for length – millimeter (mm), centimeter (cm) and meter (m)

**Variable
**A symbol used to represent a number in an expression or an unknown value in an equation. (e.g. 2

**Volume **

Quantity of a three-dimensional space contained in closed boundary often measured in cubic meter (m3) or cubic centimeter (cm^{3}). Example: the volume of a sugar cube is approximately 3,4 cm^{3}.

**Order of operations
**A specified sequence in which mathematical operations such as addition, subtraction, multiplication and division are expected to be performed.

**Tessellate
** Create a pattern by fitting shapes together in a repeated pattern with no gaps or overlaps.

**Line graphs
**A graph that uses line segments to show changes in data; the data usually represents trends, relationships, or a quantity changing over time.

**Line segments
** A straight line which links two points without extending beyond them.

**Integers
**The set of numbers consisting of the whole numbers (e.g., 1, 2, 3, 4, …), their opposites (e.g., -1, -2, -3, -4, …), and 0.

**Slides or translation
**In geometry, a transformation in which an object is moved along a straight line without turning or changing the size or shape. Every point of an object is moved the same distance and in the same direction.

**Rotations**

In geometry, a transformation in which an object is moved about a fixed point called a point of rotation.

**Reflections or flip**

A transformation in geometry in which an object is reflected in a straight line to form a mirror image. Every point of an object and the corresponding point on the image are at the same distance from the line of reflection.

**Parallelograms
**A four side shape with two pairs of parallel sides.

**Mean **

The arithmetic average of numbers. A measure of central tendency. The quotient obtained when the sum of the numbers in a set is divided by the number of addends.

**Median **

The middle value in an ordered list. If there is no middle value, the median is the average of the two middle values. Examples: The median of the numbers 1, 1, 2, 4, 5, 6, and 7 is 4. The median of the numbers 1, 1, 2, 4, 5, 6, 7, and 7 is 4.5.

**Mode **

The number or members of a data set that occur(s) most frequently in the set of data. Examples: In the set 87, 85, 86, 90, and 86, the mode is 86. In the set 87, 85, 86, and 90, there is no mode.

**Range (of a set of data)**

The difference between the greatest and the least values in a set of numbers. Examples: Given the data: 2, 7, -3, 14, -1, 6, 34, 3 The range is: 34 - (-3) = 37

**Number skills**

Being able to solve mathematical problems using knowledge of number patterns and mental math strategies.

**Number sense**

Having a good conceptual understanding of numbers and number concepts.

**Area **

The measure of the interior surface of a closed region or figure; area is measured in square units such as m^{2} or cm^{2}.

**Pythagorean theorem **

The mathematical relationship stating that in any right triangle the sum of the squares of the two legs is equal to the square of the hypotenuse; if a and b are the lengths of the legs and c is the length of the hypotenuse, then a2 + b2 = c2.

**Square roots **

A number (factor) that, when multiplied by itself, produces the given square. (e.g., the square root of16 is 4)

**Linear equations **

An equation that can be represented graphically by a straight line. (e.g., y = 2x – 7)

**Evidence of learning**

An evidence of learning is a demonstration of what a student has learned.

**Weight**

The weight represents how much an assessment is worth in percentage of the total grade.