Students learn how to add two-digit numbers w/in 20 using strips & whiteboards. Check understanding through worksheets.
Make a lesson based on the following learning intention: Adding 2 digit numbers within 20.
Students learn how to add two-digit numbers w/in 20 using strips & whiteboards. Check understanding through worksheets.
Make a lesson based on the following learning intention: Adding 2 digit numbers within 20.
Objective: Students will be able to add two-digit numbers within 20 correctly.
Materials Needed:
-mini whiteboards
-dry erase markers
-adding strips
Warm Up:
Write the following equation on the board:
14 + 6 =
Have students solve the equation using what they already know.
Guided Practice:
Pass out the adding strips to the students.
Explain how to use the strips to add two-digit numbers. Have students complete two addition equations on their strips.
Check for understanding.
Independent Practice:
Give students three equations, written on mini whiteboards, to solve:
1. 12 + 7
2. 17 + 3
3. 19 + 1
Have students come up to the board one-by-one to solve the equations in front of the class, using their adding strips. Check for understanding.
Conclusion:
Review the lesson by having students solve one more equation on their whiteboards. Check for understanding.
Assessment:
Have students complete a worksheet in which they add two-digit numbers within 20.