Online Activities for 3rd - 6th Classes White Rose Addition & Subtraction: a series of lessons on addition and subtraction. These lessons could be followed up with other addition and subtraction lessons in year 3, year 4, year 5 and/or year 6.  Happy Numbers Third Grade: Third class pupils could work through the activities from Module 2, Topics C and D. Fourth class pupils, and above, could go to the activities for Fourth Grade and work through the activities in Module 1. Hit the Button: a great site for practicing quick-fire Number Bonds (up to 100) and Doubles Maths Frame - Maths Invaders: Shoot the spaceship with the correct answer and dodge the incoming fire. Select play game and then Addition or Subtraction; choose your approximate class level/year to play those games. Kakooma: If you choose + then click on the number that is the sum/total of two other numbers (if you choose X then click on the number that is the product of two other numbers) Thinking Blocks for Addition and Subtraction: an ideal way to start using bar models, or further practice using bar models, to model word problems and computation. That Quiz - Arithmetic: Use this quiz to practice different types of addition and subtraction calculations. You can use the options on the left hand side to make the types of calculations easier or more difficult. Estimating sums and differences to win chances to take penalties in a shoot out. I Know it! - Addition & Subtraction (Grade three): Scroll down to the addition and subtraction section to do any of the activities. If too simple, go to the addition and subtraction section in Grade Four or Grade Five. Splash Learn - Addition and Subtraction Games: An assortment of games organised according to US grade levels; start with the games for third grade level. If too simple, go to the Grade Four games. practice games and Subtraction practice games from ixl.com. You can do a number of free quizzes each day without having a subscription. (Please note that the class levels given do not always align accurately with the content of the Irish Primary Curriculum)