Mangahigh
Mangahigh: Number: Number Partners Up to 20
Students explore the concept of number partners by working through an online tutorial and then attempting a ten question quiz that increases in difficulty as questions are answered correctly.
Khan Academy
Khan Academy: Find Missing Number (Add and Subtract Within 20)
Learn how to solve problems like "___ - 7 = 18" where you don't know one of the values in an addition or subtraction equation. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or...
E-learning for Kids
E Learning for Kids: Math: Penguins: Twenty: Number 20 and Money
Practice counting, addition, and subtraction by making sure all twenty penguins have enough clothes and food.
ICT Games
Ict Games: Take Away Targets
Use the targets under the number line to help you answer subtraction facts up to 20.
Teachnology
Teachnology: Addition and Subtraction Teaching Theme
Addition and Subtraction Math Theme provides an excellent collection of free sample worksheets, teacher resources, lesson plans and interactive media to support addition and subtraction skills.
ClassFlow
Class Flow: Fact or Opinion
[Free Registration/Login Required] Students will be introduced to the difference between facts and opinions. They will practice determining which statements are facts and which are opinions. Activities include sorting and classifying...
Khan Academy
Khan Academy: Word Problems With "More" and "Fewer" 2
Practice solving more word problems by finding how many more (or fewer) objects there are. Numbers used are 20 or less. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive...
Illustrative Mathematics
Illustrative Mathematics: Hitting the Target Number
The purpose of this task is to help students develop flexible strategies for adding and subtracting within 20. Students will pick 5 number cards from pre-made cards labeled 1-10. Then, another student will pick a "target number" between...