### Lesson Plan

Students sketch base-ten blocks in this lesson that builds both number sense and fluency adding to 20!
Need extra help for EL students? Try the Solving for One and Ten More pre-lesson.
##### View aligned standards
Need extra help for EL students? Try the Solving for One and Ten More pre-lesson.

#### Learning Objectives

Students will be able to add one more or 10 more using pictures to represent quantities.

The adjustment to the whole group lesson is a modification to differentiate for children who are English learners.

#### Introduction

(5 minutes)
• Write the following problem on the board: "Sara collects seashells. She has 10 seashells in her collection already. Then, she goes to the beach and finds 4 more seashells. How many seashells are in her collection now?"
• Think aloud about the problem. Remind students that she started with 10, and then found more shells, so students should add to find the total number.
• Allow students think time, and then choose a few students to share a solution. Ask students how they solved the problem. For example, did students count on from 10 using the number line, or have the fact memorized?

Beginning

• Draw a picture to represent the story problem.
• Emphasize "four more" as you read the problem.

Intermediate

• Tell students to turn and talk to a partner to share a strategy for solving the problem. List ideas for solving the problem (i.e., draw a picture or count on the number line) on the board.
• Prompt students to explain how they know Sara has 14 seashells using the sentence stem, "I know she has ________ seashells because ________."