Lesson 2
Fluidez al revés
Lesson Purpose
The purpose of this lesson is for students to fluently add and subtract within 20 to find unknown addends.
Lesson Narrative
In previous lessons, students assessed their fluency with sums and differences within 20. They shared different methods for finding the value of sums and differences mentally.
In this lesson, students find unknown addends within 20 and continue developing fluency with addition and subtraction within 20.
The cool-down should be completed before the lesson synthesis so that students can share their responses during the lesson synthesis.
- Engagement
- MLR7
Learning Goals
Teacher Facing
- Fluently add and subtract within 20.
Student Facing
- Sumemos y restemos con fluidez.
Required Materials
Materials to Gather
Materials to Copy
- Number Mix Up, Spanish
- Number Cards 0-19
Required Preparation
Activity 1:
-
Create a set of cards for each group of 2.
Activity 2:
- Each group of 2 needs the digit cards 0–9 from the card set used in the previous activity.
CCSS Standards
Addressing
Lesson Timeline
Warm-up | 10 min |
Activity 1 | 20 min |
Activity 2 | 15 min |
Lesson Synthesis | 10 min |
Cool-down | 5 min |
Teacher Reflection Questions
Print Formatted Materials
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Student Task Statements | docx | |
Lesson Cover Page | docx | |
Cool Down | Log In | |
Teacher Guide | Log In | |
Teacher Presentation Materials | docx | |
Blackline Masters | zip |