Math Extensions
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Third Grade

General Websites

Coding:
Code.org  - beginner through advanced coding courses

Problem Solving:
NRich Maths - general math/brainteaser challenge; live and archived problems available

Puzzles:
Daily Sudoku

Book A

Chapter 1 - Numbers to 10,000
  • Number Balls - Ordering positive and negative numbers 
  • Greg Tang Place Value - Choose "whole numbers" or "decimals" and for more of a challenge, select "hard" level. 

Chapter 2 - Mental Math and Estimation
  • Add Em Up! - Strategic addition and subtraction 
  • Train - Strategic addition 
  • Math is Categorical - Games for addition, subtraction, and measuring length
  • NumberBond - Building combinations that add up to a specific sum (5, 10, 100)
  • Tae Kwon Donuts - Combinations that equal benchmark numbers such as 10, 100...uses positive and negative numbers
    ​
Chapter 3 - Addition Up to 10,000
  • Drop and Drag Math add 2,3,4 digit numbers to 10,000
  • Broken Calculator -  the user is presented with a target number and a partial set of keys on a basic calculator where they use the given keys to make the target numbers

Chapter 4 - Subtraction Up to 10,000
  • Drop and Drag Math  subtract 2,3,4  digit numbers to 10,000

Chapter 5 - Bar Models, Addition and Subtraction
  • Add and subtract with models-  label and model word problems

Chapter 6 - Multiplication of 6, 7, 8, 9
  • Grand Prix - race to practice your fact fluency
  • Number Invaders - practice basic facts while saving the Earth
  • Swimming Otters - solve for an unknown factor to race against other otters
  • Factor-Tris - like Tetris, but you create different number arrays


Chapter 7 - Multiplication
  • Number Cop - arrest multiples of a number
  • Factor Feeder - find and "eat" factors of numbers

Chapter 8 - Division
  • Lucky Drops - division fact practice - you pick which facts
  • Pony Division - practice division while helping ponies play tug-of-war
  • Krypto - use all four operations to make the target number
  • Factor game - Find all the factors for a number.


Chapter 9 - Bar Models, Multiplication and Division

  • Model multiplication and Division using labels and blocks to model word problems



Book B

Chapter 10 - Money
  • Scottie Coins-calculate the amount of coins and then think of way to make it with fewer coins

Chapter 11 - Metric Length, Mass, Volume
  • Math is Categorical - Practice length
  • Bamzooki - convert measurements from metric to standard while building a race track

Chapter 12 - Real World Problems: Measurement
  • Unmarked Jugs - You invented a time machine and need to go back in time to locate various measurement tools

Chapter 13 - Bar Graphs and Line Plots

Chapter 14 - Fractions
  • Dirt Bike Proportions - practice equivalent fractions
  • Matching Game - equivalent fractions
  • Fraction Feud - battle the computer by logging on as a guest and forming larger and smaller fractions 

Chapter 15 - Customary Length, Weight, Capacity
  • Sal's Sub Shop- help Sal cut the subs in various lengths
  • Horrendous Soup-make a recipe for the most disgusting soup!
  • Measurement Workshop- build cities out of metric or standard units

Chapter 16 - Time and Temperature
  • Approaching Midnight - a challenge/logic game where you use elapsed time
  • Temperature Math - add positive and negative numbers to determine temperature in cities around the world

Chapter 17 - Angles and Lines
  • Fruit Picker - pick apples using specific angle measurements
  • Wash the Dog - squirt the dog with a hose given specific angle measurements

Chapter 18 - Two-dimensional Shapes
  • Shape Mods - use flips, turns, slides to play a game
  • Tangrams - use 4 tangram pieces to complete puzzles
  • Cyberchase Tangrams - use all tangram pieces to complete puzzles
    ​
Chapter 19 - Area and Perimeter
  • Area and Perimeter - measure length and width of various rectangles and determine area and perimeter
  • Perimeter and Area - calculate perimeter and area of rectangles and irregular shapes (level 3)
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