Lesson provided by CHATGPT
Lesson Plan: Addition and Subtraction within 20
Grade Level: 1st Grade
Subject: Math
Topic: Addition and Subtraction within 20
Duration: 45 minutes
Learning Objectives:
- Students will be able to add and subtract within 20.
- Students will develop their understanding of basic addition and subtraction facts through
hands-on activities. - Students will explain their thinking and strategies for solving math problems.
Materials: - Whiteboard and markers
- Manipulatives (e.g., counting blocks, number lines, or counters)
- Printable number lines (optional)
- Paper and pencils for students
Lesson Outline:
- Warm-up (5 minutes)
- Begin by reviewing simple addition and subtraction facts with the students. Write simple
equations on the whiteboard (e.g., 3 + 2 = ? and 5 – 1 = ?). - Have students answer the questions aloud, and if needed, use a number line on the
whiteboard to help students visualize how to add and subtract.
- Direct Instruction (10 minutes)
- Introduce the concept of addition and subtraction within 20 using manipulatives. Show
students how to count objects (e.g., counting blocks) to solve addition and subtraction
problems.
o Addition example: “If I have 8 blocks and I add 5 more, how many blocks do I
have?”
o Subtraction example: “If I have 16 blocks and I take away 7, how many blocks are
left?” - Demonstrate how to use counting strategies like counting on for addition and counting
back for subtraction.
- Guided Practice (10 minutes)
- Have students work with a partner to solve problems on the whiteboard using
manipulatives. Write a few addition and subtraction problems on the board, such as:
o 12 + 4 = ?
o 17 – 8 = ? - Ask students to demonstrate how they would solve these problems using counting blocks,
number lines, or other strategies. Walk around to monitor and support as needed.
- Independent Practice (10 minutes)
- Provide each student with a worksheet that includes a mix of addition and subtraction
problems within 20 (e.g., 14 + 5, 9 – 3, 13 + 6). - Allow students to work independently, solving the problems using the strategies they have
learned (e.g., counting on, using manipulatives, or using a number line). - Circulate around the classroom to assist students who may need additional support.
- Closing (5 minutes)
- Ask students to share one strategy they used to solve a problem (e.g., “I counted on from
12” or “I used my number line”). - Review the key concepts of addition and subtraction within 20, emphasizing the strategies
discussed. - End by asking a few students to solve an addition or subtraction problem on the board for
the class to discuss as a group.
5E MODEL
Digital Tools included in this revised lesson plan: Kahoot and Seesaw
Engage (5 minutes)
Activity: Topic of Addition and Subtraction, in which the Teacher will present a situation in
which adding and subtracting are necessary. The teacher will mention sharing stickers, giving
away snacks, or collecting pencils. Students will be asked to predict answers to simple math
problems based on the examples and how they might solve them.
What the Students Do: Students will listen attentively to the teacher’s examples at their desks.
Students will think of how to solve given problems and make predictions. Students will engage
with Seesaw by interacting with an introductory activity where they can draw and use colors and
shapes to represent numbers in the scenario. The scenario may be about there being 3 green
pencils and 10 red pencils, how many pencils are there in all? In which the students can draw and
use colors to figure out “3 + 10.”
What the Instructor Does: The teacher starts by asking, “If you have 12 pencils and you give four
away, how many do you have left?” The teacher then models the first problem by counting the
objects. The teacher introduces Seesaw and guides the students on how to log on to their iPads
by demonstrating and showing how to use the drawing tools to represent their thinking. The
teacher provides feedback on students’ responses and guides them onto the next step.
Concept(s) Learned: Introduction to the topic of adding and subtracting. Understanding that
adding is joining and subtracting is taking away. Use of Seesaw to visualize mathematical
concepts.
Evidence Gathered: The teacher observes student’s responses to Seesaw, looking for signs that
students understand how to represent addition and subtraction visually.
Explore (10 Minutes)
Activity: Students will work on interactive problems in SEESAW, using its interactive drawing
tools to explore different strategies for solving addition and subtraction problems. These
problems will be similar to the Engage problems but will include variations for deeper
understanding.
What the Students Do: Students use Seesaw to solve problems by drawing pictures to represent
numbers. Students will work independently or in pairs discussing how to solve mathematical
problems.
What the Instructor Does: The teacher will observe how students work together or separately to
solve the problems, only offering help when necessary. The teacher encourages students to talk
about strategies they are using such as counting, drawing, or using a number line.
Concept(s) Learned: Strategies for solving addition and subtraction problems. Visualization of
addition and subtraction through digital tools.
Evidence Gathered: The teacher can observe what strategies students are using to solve problems
and how they are interacting with Seesaw.
Explain (10 Minutes)
Activity: The teacher will review and explain certain strategies to solve for addition and
subtraction. Afterward there will be a discussion on the strategies used during the Explore phase
and in which the class will work together to solve problems on the whiteboard.
What the Students Do: Students will listen to the teachers explaination of addition and
subtraction strategies. Students will participate in a whole class discussion on the strategies they
used and how they can apply these strategies to other problems.
What the Instructor Does: The teacher explains the strategies for solving addition and subtraction
problems. The teacher models a few more addition and subtraction problems on a white board
using visual aids such as a number line or counters to demonstrate the strategies. The teacher
encourages students to ask questions.
Concept(s) Learned: Understanding different strategies for addition and subtraction.
Emphasizing verbal problem-solving strategies.
Evidence Gathered: Teacher assesses student understand through verbal explanation and
participation throughout class discussions. Teachers will observe students’ articulations for their
reasonings and problem-solving skills using different strategies.
Elaborate (10 Minutes)
Activity: Students will play a math quiz game in Kahoot!, answering multiple addition and
subtraction questions. The quiz will include both difficult problems to challenge and reinforce
the students understanding.
What the Students Do: Students kill participate in the Kahoot! quiz, choosing answers to both
addition and subtraction questions. Students will work competitively to answer right but by
doing so they will gain instant feedback from the game.
What the Instructor Does: The teacher will set up the Kahoot! game on every student’s device
and explain how the quiz works, making sure that all students are ready to participate. The
teacher will encourage all students while monitoring the game and explaining answers when
needed.
Concept(s) Learned: Reinforcement of addition and subtraction through an interactive and
engaging quiz. The application of learned strategies in a competitive but engaging environment.
Evidence Gathered: Teachers can view the answers taken from the Kahoot! quiz and take notice
of which students need more support and which do not. This also provides insight into the
students’ quick recall and application of math facts.
Evaluate (5 Minutes)
Activity: Students will record how they solved one of the problems from the Kahoot! quiz using
seesaw. The teacher will review these recordings to assess the students’ understanding on
addition and subtraction.
What the Students Do: Students will log into Seesaw and record a short video or drawing
explaining how they solved at least one of the mathematical problems from the Kahoot! quiz.
What the Instructor Does: The teacher will listen to and review student’s recordings or drawings
on Seesaw. The teacher will provide personalized feedback to each student and assessing their
understanding of the lesson’s main concept.
Concept(s) Learned: Understanding of addition and subtraction concepts and reflection on
problem- solving strategies.
Evidence Gathered: Reviewed Seesaw recordings to assess students understanding of the topic
and provide targeted feedback.
Reflection
After redesigning the lesson plan provided by ChatGPT titled “Lesson Plan: Addition and
Subtraction within 20” into a 5E model including two digital tools, I have noticed that both
lesson plans have their weaknesses and strengths. With the lesson plan provided by ChatGPT,
the strengths i noticed included its simplicity and straightforwardness. It is easy to implement
and provides simple teacher-guided instructions with student practice using materials like
manipulatives. The use of manipulatives is a strength, as they help students visualize math
concepts through counting blocks. Additionally, the lesson plan allows for immediate feedback,
allowing the teacher to observe the student’s struggles and offer real-time help to questions
students may have.
However, due to the simplicity of this lesson plan, limited engagement may take place,
leading to students not wanting to pay attention or participate. As this lesson plan lacks appeal,
students may become disengaged, especially during the independent worksheet. Another
weakness would be its one-size-fits-all way of teaching, as the lesson is made to teach all
students the same way regardless of whether they need help, another way of retaining
information, or not.
With the 5E model approach, its strengths would consist of increased engagement as well
as motivation. This would be due to the two digital tools, Seesaw and Kahoot! as both digital
tools increase student engagement and participation. Seesaw allows for hands- on activities
which include drawing, recording, and the visual representation of math problems, making the
learning experience more fun. Like Seesaw, Kahoot! Motivates students to participate and stay
engaged as there is a competitive element that sparks their interest. Kahoot! also provides
immediate feedback on answers, this allows for quick misconceptions and identification of areas
that need further practice. Additionally, compared to the one-size-fits-all approach, Seesaw
allows students to work at their own pace and demonstrate their understanding visually; through
this approach, teachers can have a deeper understanding of the student’s thought processes. This
digital tool is also very beneficial for students who need visual or kinesthetic support. With the
use of Seesaw and Kahoot!, students are given flexibility in managing their individual learning
speeds. Those who need more time can revisit their digital notebooks, while others can advance
and complete more complex problems without slowing down the whole class.
However, with this revised lesson plan, there is a dependency on technology, which may
present technical difficulties with Wi-Fi or equipment malfunction. The lack of devices can also
become problematic, as students may fight over devices, leading to some students not being able
to participate, and limiting the effectiveness of the lesson. Additionally, students who are
unfamiliar with these tools may experience frustration. The use of these tools and setup may be
time-consuming and will take time away from the lesson. As such, this is a lesson for 1st-grade
students who may become antsy and disengaged from the wait time as they do not have much
patience.
