Your next great Lessn starts here.

Welcome to Addition! – Learning to add numbers – Using a number line – A line with numbers in order helps us add – Addition finds totals – Like combining two groups of apples to see all you have – Practice with examples – We’ll add numbers together up to 20 using the number line | This slide introduces first graders to the concept of addition as a means of finding out the total amount of a combined group. Emphasize that addition is a basic but powerful tool in math. Introduce the number line as a visual aid that will help them understand and perform addition easily. Explain that a number line is a straight line with numbers placed at equal intervals along its length. Use simple, relatable examples such as combining groups of apples or toys to illustrate the concept of addition. Encourage the students to participate by thinking of things they often combine in their daily lives. The practice examples should involve adding numbers up to 20 using the number line, ensuring that the students grasp the concept of addition visually and practically.

Understanding Addition Sentences – What is an addition sentence? – It’s like a math sentence that adds numbers together. – Example: 2 + 3 = 5 – This shows 2 and 3 added together make 5. – ‘Sum’ means the answer – The sum is the total we get after adding. – Using a number line to add – We can hop along the line to add numbers up to 20. | This slide introduces the concept of addition sentences to first graders. Start by explaining that an addition sentence is a way to write down how we put two groups of things together to make a bigger group. Use simple examples like adding apples or toys to make it relatable. Clarify that the word ‘sum’ refers to the result we get after adding the numbers. Demonstrate how to use a number line for addition by starting at the first number and making hops equal to the second number to reach the sum. Encourage students to practice with different numbers up to 20 using number lines provided in class.

Meet the Number Line – Number line basics – A straight path with numbers at equal spaces – Visualizing addition – See how numbers come together to make a new number – Jumping forward to add – Imagine hopping ahead on the line for each addend – Practice with sums up to 20 | Introduce the concept of a number line as a foundational tool in understanding addition. Explain that it is like a ruler for numbers where each mark represents a number. Demonstrate how to use a number line to visualize the process of addition by starting at one number and ‘jumping’ forward to the next, according to the number being added. Provide examples with sums up to 20, ensuring that students grasp the concept of sequential addition. Encourage students to draw their own number lines and use them to solve addition problems. This will help them internalize the concept of addition as a forward movement along the number line.

Adding with a Number Line – Example: 4 + 3 – Start at 4 on the number line – Find the number 4, it’s our starting point – Make 3 jumps forward – Count and hop forward 3 spaces from 4 – The landing number is the sum – After 3 hops, we land on 7, so 4 + 3 = 7 | This slide introduces students to the concept of using a number line to add numbers up to 20. Start by explaining the example 4 + 3. Show them how to find the number 4 on the number line and use it as the starting point. Then, demonstrate how to make 3 jumps forward to reach the sum. Each jump represents adding one more. After 3 jumps, identify the number they land on, which is 7 in this case, and explain that this is the sum of 4 + 3. Encourage students to use their fingers to count as they ‘jump’ on the number line. This visual and physical representation helps solidify the concept of addition.

Your Turn to Jump on the Number Line! – I’ll give you an addition sentence – Show the jumps on the number line – Start at the first number – If our sentence is 5 + 2, put your finger on 5 – Count forward to find the sum – From 5, make 2 jumps forward to land on 7 | This slide is an interactive class activity designed to help first graders understand addition using number lines. The teacher will provide an addition sentence, and the students will demonstrate the addition by making jumps on a number line. It’s crucial to remind students to start at the first number in the sentence and make the correct number of jumps forward to find the sum. For example, with the sentence 5 + 2, students start at 5 on the number line and make two jumps forward to land on 7, which is the sum. The teacher should walk through this process with the class, then allow students to try with different addition sentences. Possible variations for individual practice could include using different starting numbers and varying the number of jumps, always ensuring the sums do not exceed 20.

Adding Bigger Numbers Using Number Lines – Start with a bigger number like 10 – Make 6 big jumps forward on the line – From 10, hop to 11, then 12, up to 16 – Count each jump to find the sum – Each hop adds 1 more, so 10 becomes 16 – Practice with different numbers | This slide introduces students to the concept of using a number line to add larger numbers, specifically focusing on sums up to 20. Begin by placing a marker on the number 10 on the number line. Then, demonstrate how to make 6 consecutive jumps forward to reach the sum of 16. Emphasize the importance of counting each jump to ensure accuracy. Encourage students to practice this technique with different starting numbers and number of jumps to solidify their understanding of addition using number lines. Provide several examples and possibly incorporate a hands-on activity where students can use physical number lines and markers to practice.

Let’s Practice Addition with Number Lines! – I’ll show addition sentences – Use your number line to add – Start at the first number, jump forward by the second number – Find the sums up to 20 – We’ll review the answers together – Class participation to ensure understanding | This slide is designed for an interactive class activity to practice addition using number lines. Present several addition sentences to the class and guide them on how to use a number line to find the sum. For example, if the sentence is 5 + 3, students will start at 5 on their number lines and make 3 jumps forward to land on 8. Encourage students to count aloud as they make their jumps. After they have found the sums, go over the answers as a class to confirm and correct them. This activity will help reinforce their understanding of addition and the concept of ‘counting on.’ Prepare to offer assistance to students who may struggle and have additional practice sentences ready for those who grasp the concept quickly.

Number Line Hopscotch Activity – Play hopscotch with a number line – Hop forward to add numbers – Find sums using hops – If you start at 5 and make 3 hops, where do you land? – Write down your answers | This interactive class activity uses a physical number line on the floor to teach addition up to 20. Students will hop along the number line to visually and kinesthetically experience the addition process. Before starting, explain how each hop represents adding one more. For the activity, each student will take turns, starting at different numbers and making a specific number of hops forward to find the sum. After hopping, they should write down the starting number, the number of hops they made, and the sum they reached. This exercise helps solidify the concept of addition as ‘putting together’ and the number line as a tool for visualizing addition. Possible variations for different students could include hopping backward to subtract, using different starting points, or hopping in multiples to introduce early multiplication concepts.

Great Work on Addition! – Adding with number lines is fun! – Addition sentences show total amounts – If you have 3 apples and get 2 more, the number line helps you see you have 5. – Practice makes perfect in addition – You’re on your way to being experts! | This slide is meant to congratulate the students on their hard work learning to add using number lines and to encourage them to keep practicing. Emphasize the importance of addition sentences in understanding the total sum of objects or numbers. Encourage them to practice with different numbers up to 20 to become confident in their addition skills. You can suggest playing addition games, using physical number lines, or drawing their own number lines for practice. Celebrate their progress and remind them that with practice, they will become addition experts.