2.OA.B.2 Lesson Plans
CCSS.MATH.CONTENT.2.OA.B.2
:"Fluently add and subtract within 20 using mental strategies. By end of Grade 2, know from memory all sums of two one-digit numbers."
Our Take: Adding and subtracting within 20 should become quick and easy work for students by the end of second grade. Give students plenty of repetition through various types of worksheets and games to hone this skill.
These lesson plans can help students practice this Common Core State Standards skill.
Lesson Plans
Addition: Over in a Flash
Lesson plan
Addition: Over in a Flash
Encourage your students to take part in some friendly competition with this game that has students practice their addition skills with flashcards.
1st Grade
Math
Lesson plan
What's the Difference?
Lesson plan
What's the Difference?
Give your students a great basis in mathematics with this lesson that has them use a number line to find differences for basic subtraction facts.
2nd Grade
Math
Lesson plan
Adding Within 20
Lesson plan
Adding Within 20
This scaffolded EL lesson will help your students fluently add within 20, while reinforcing parts of a whole. Use as a pre-lesson for Addition: Over in a Flash, or as a stand alone activity.
2nd Grade
Math
Lesson plan
