Math Tools
Virtual Manipulatives - Black Gold
Math Activities
Stopwatch
Kahoot - Basic Facts Quiz
Soft Schools - Numerous Math Activities for all grades
AAA Math - All Skills for Grade 4 Math
IXL Grade 4 Math - Practice questions for all skills used in grade 4 math
Greg Tangs World of Math - practice math skills
Mr. Nussbaum Interactive Math - Website with games and activities that are interactive to help with all topics in Grade 4 Math.
Math's Year 2000 - Website that allows students to choose the correct time answer from a list when given a word problem.
Mr. Nussbaum Time Game - Website that allows students to practice finding a time on a clock face when given a digital time.
Ken Ken - Math Puzzles - Like Sodoku using the 4 operations - very addictive - All skill levels
Smart Notebook - Math Lessons
Bedtime Math - Apple and Google Play App

Place Value
Place Value Charts
A brilliant resource for learning or teaching place value. Different levels of difficulty which include decimals.
Diennes and Coins
Useful place value teaching resources which cover hundreds, tens and units and also decimals. With some you will need to drag the Diennes blocks to represent the number you want.

Rounding
Rounding to the nearest ten - Video
Rounding to the nearest hundred - Video
Pirate Rounding Numbers Game
Motorcycle Rounding Game
Rounding Numbers Crocodile Game

Math Live - Learn Alberta
Interactives - Under the Sea
Place Value
Multiples/Factors
Proper Fractions
Equivalent Fractions
Comparing and Ordering Decimals
Addition and Subtraction of Decimals
How to read a Decimal - Video
Multiplication of Whole Numbers
Division of Whole Numbers
Patterns
Area and Perimeter
Area and Perimeter of Irregular Shapes
Volume
Time
Polygons
Probability
Estimating - About how much?
Interactives - All Topics

Area and Perimeter
Perimeter - Introduction - Youtube
Perimeter - Cartoon - Youtube
Area - Cartoon - Youtube
Area and Perimeter - in real life - Youtube

Time

Digital and Analog Clocks
Digital and Analog Clocks - Video
Interactive Time from Digital to Clock face problems.
Stop the Clock
Telling Time
Stop the Clock
Interactive Clock
What Time is it?
Can you tell the time?
Practise Telling Time - Numerous Activities
24 Hour Clock
24 Hour Clock Video - Youtube

Addition

Adding two-digit numbers without regrouping- Video
Adding two-digit numbers without regrouping - Video
Adding two-digit numbers with regrouping - Video
Adding three-digit numbers - Video
Adding four-digit numbers - Video
Mathbuster Addition Facts Challenge (up to 100) - Created by Owen S. in 4B
Worksheets
Arcademic Skillbuilder

Subtraction

Math buster Subtraction Facts Challenge (<99) - Created by Owen S. in 4B
Worksheets
Subtraction Blaster
Two Digit Subtraction without regrouping
Two Digit Subtraction with regrouping
Two Digit Subtraction with regrouping
Three Digit Subtraction without regrouping
Three Digit Subtraction with regrouping
Four Digit Subtraction with regrouping

Multiplication Facts

Math Lines
Multiplication Blocks
Kakooma
Clear it
Math Bingo
Product Blocks
Number Trails
Multiplication Snake
Mathbuster Multiplication Facts Challenge - Created by Owen S. in 4B
Matching Activity - Facts from 1 - 10
Flashcards - Facts from 1 - 10
Concentration - Facts from 1 - 10
Matching Activity - Facts from 1 - 12
Flashcards - Facts from 1 - 12
Concentration - Facts from 1 - 12

Multiplication

Variety of Activities From Arcademic Skill Builder
Multiply by 4 using the doubles strategy - Video
Learning your Multiplication Facts and why it's not so hard - Video
Learning your 6-9 timetables using your hands - Video
Multiplying 2 digits by 1 digit - Video
Multiplying 3 and 4 digits by 1 digit - Video
Multiplying by 10, 100, and 1000 - Video
Division
Matching Activity
ConcentrationArcademic Skill Builder - Excellent site to challenge friends online in a head to head competition to see who can answer basic facts questions the fastest through a game.
Times Tables
1 - Introduction to Division - Youtube
2 - Learning Division - Youtube
3 - Division - Youtube
4 - Solving Division using Multiplication - Youtube
5 - Introduction to Long Division - Video
6 - Long Division Continued - Video
Dividing 2, 3 digits numbers by 1 digit - Video
Dividing Songs

Fractions/Decimals
Introduction to Fractions Video #1
Introduction to Fractions Video #2
Gamequarium Fraction Games - Introduction
Fraction Games #1
Fraction Games #2
Fractions of a Set - Game
Fractions of a Set - Video #1
Fractions of a Set - Video #2
Fractions of a Set - Video #3
Introduction to Decimals - Video
Fraction Machine Tool - Compare Fractions
Equivalent Fractions

Other
Comparing and Ordering Numbers
Study Jams - Covers all areas of Math (Videos, activities, explanations - an excellent resource)
Place Value Charts Tablet friendly
A brilliant resource for learning or teaching place value. Different levels of difficulty which include decimals.
Diennes and Coins Flash
Useful place value teaching resources which cover hundreds, tens and units and also decimals. With some you will need to drag the Diennes blocks to represent the number you want.