Digital Doubles

Laurel Enoch
Lesson Plan: First Grade Mathematics

Common Core Standards:
CCSS.Math.Content. 1.OA.C.6 Add and Subtract within 20
CCSS.Math.Content 1.OA.D.8 Determine the unknown whole number in addition or subtraction equation relating three whole numbers.

Objectives: Students will use doubles as a strategy to solve addition facts with sums within 20.

Essential Question: What are doubles?

Vocabulary: Doubles
Addition
Sums

Materials:
Student Tablets- one for each child
Internet with YouTube
http://www.youtube.com/watch?v=ljPKoNJH1Jg
http://www.youtube.com/watch?v=YFk7l4bq3DM
SmartBoard
Go Math! Houghton Mifflin Harcourt
iTools Primary: Counters- Houghton Mifflin Harcourt Virtual Manipulatives

Engage: Show the students both YouTube videos on doubles using the smart board. One video is a doubles rap by Harry Kindergarten. The next video shows a first grade class reciting a doubles poem.

Prior Knowledge
Where do we find doubles?
Have the students think of different places we find doubles in the real world. Some examples may be: eyes, animal legs, insect legs, four leaf clovers, etc. Discuss why these are doubles. Why wouldn’t a three leaf clover be considered a double? Students can use the smart board to draw pictures of items in the real world that are considered doubles.

Lesson:
Using the smartboard, show students how to use the iTools application to add doubles. Demonstrate how to use the counter tool to add doubles. Place two sets of three counters side by side.
Say: We have two towers with 3 counters. Have the children count how many counters we used in all . Remind students that insects have six legs. Three on one side and three on the other, just like our example. This way the students will see a real world connection to the math problem.

Do more guided problems as a whole group. See if students can come up with a real world example of each problem.

Allow students to try examples on the smartboard.



Guided Practice:
After modeling several examples, have students use the iTools application to practice adding doubles. Monitor the students learning by walking around and asking questions about their double problem.

Cooperative Learning:
After students have had time using the virtual manipulatives independently, give the students time work in pairs to create doubles addition problems for one another. See how fast students can come up with the sum of a doubles problem. Use the tablets to show doubles facts.

Assessment:
Check for student understanding. Monitor during the individual practice as well as the partner practice.

Closure: Show the YouTube examples one more time. See if the students can sing along.

Adaptations: Students who need some extra help can work with the teacher. Students can use the virtual manipulatives as well as the class manipulatives, so the lesson will be visual and kinesthetic.

Challenge: Some students may already have doubles facts memorized. Challenge these students by practicing adding two-digit doubles. See if students can come up with different problems using two-digit doubles.

Further Development: Students can learn the doubles rap or rhyme from the YouTube video. Create a classroom song to record for YouTube. This can be shared with other first graders and parents of the students.