1.OA.1 Time assessed: 3rd 9 Weeks
Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem
Activities to do at home not using technology:
Discuss word problems dealing with real world situations.
EX. We have 5 people in our family and we are having 2 guests for dinner. How many forks will we need?
Links to online activities/videos that practice this activity:
Link to a practice assessment:
1.OA.2 Time Assessed: 1st 9 Weeks
Solve word problems that call for addition of three whole numbers whose sum is less than or equal to 20 (e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.)
Activities to do at home not using technology:
Discuss real world word problems.
Ex. We have 3 red cars, 4 blue cars, and 2 yellow cars. How many cars do we have in all?
Students need to learn how to create an addition sentence using numbers. Ex. 3 + 4 + 2 = 9
Links to online activities/videos that practice this activity:
Link to a practice assessment:
1.OA.3 Time Assessed: 2nd 9 Weeks
Apply properties of operations as strategies to add and subtract.
2 Examples: If 8+3=11 is known, then 3+8=11 is also known. (Commutative property of addition.) To add 2+6+4, the second two numbers can be added to make a ten, so 2+6+4 = 2+10=12. (Associative property of addition.)
Activities to do at home not using technology:
When solving a problem, draw a line down the equal sign. Use a part, part, whole chart to solve the missing part of the equation.
Here's a free downloadable Part Part Whole Chart
Talk about numbers that make 10. (ex. 7+3, 2+8, 5+5)
When adding 3 numbers talk about which numbers are “friendly” using these 3 strategies shown in the image to the side.
Links to online activities/videos that practice this activity:
1.OA.4 Time Assessed: 2nd 9 Weeks
Understand subtraction as an unknown-addend problem. For example, subtract 10 - 8 by finding the number that makes 10 when added to 8
Activities to do at home not using technology:
Talk about using addition to subtract.
Example 12 - 8 = _______ Think: What can be added to 8 to make it equal 12?
____ + 8 = 12 OR 8 + ___ = 12
Use a part part whole chart to solve problems.
The missing number would be 4.
1.OA.5 Time Assessed: 1st 9 Weeks
Relate counting to addition and subtraction (example: counting on 2 to add 2)
This practices counting on. I drew 5 blanks so the student knows to count on 5 numbers and then stop. You can do this to fit the needs of your individual student.
This video shows a student using the strategy to count on to add.
This is an example of the "Lock and Load" strategy
Activities to do at home not using technology:
To practice counting on:
-Call out any number between 0-100 to your child. Have him verbally start counting from the number either counting up or counting back.
-On popsicle sticks (or craft sticks) write a number with some blanks after it (pictured left A). The child will draw on a popsicle stick and start counting on from the beginning number. To spice up the game, you can put popsicle sticks with the word “BANG” on it, and when that stick is drawn, you put all your sticks back and start over. You can put “WILD” for the student to get a free turn. (Pictured left)
To relate to addition:
-When practicing with flashcards or when you give your child a random number, The student will find the number to place down in front of them. They will use counters to represent the other addend in the number sentence. The student will point to the number and move the counters to count on until they get the sum. Video
-When practicing with flashcards, you can allow the student to use a Number Line or a Number Path. If you click those words, you can print out some that we use in the classrooms. Call out an addition fact. Have the student either circle or place a counter on that number then move forward (or backwards for subtraction) to count on to see which number they land on.
-Lock and Load: The parent will give the student a math problem verbally. The student will “lock” their number into their heads with the motion in the video. Then they will use their fingers to count on. Video
Links to online activities/videos that practice this activity:
Link to printable activities and explanation of this strategy even more
Link to a practice assessment or a very detailed explanation of how this is assessed:
There are 10 problems on this assessment for a front/back test.
The front 5 problems are addition problems only, and they are given a number line under each problem with numbers 0-20.
The back 5 problems are subtraction problems only, and they are given a number line under each problem with numbers 0-20.
1.OA.6 Time Assessed: Ongoing Skill
Add and subtract within 20. Fluently add and subtract within 10.
Activities to do at home without technology:
Pictures will take you to blogs with more directions and ideas if you click on them!
Take flashcards and a blank board game *you can use one you already have at home* to move the game piece the sum of the flash card.
To make it more challenging, you can only move if you get the correct answer in 5 seconds or less!
This site is filled with fun activities to do at home to practice addition fluency!
Click the picture for directions, but this game could be played without a printer!
You could write addition and subtraction facts on pieces of paper, popsicle sticks, etc. and when the child gets a BOOM! they have to put their facts back!
Click this for fun games and printables to practice at home!
Online Games/Activities
Jack Hartmann Addition fluency workout (You can look up more fluency and fitness on YouTube)
Practice Test:
For OGP Students:
Students are sent home with a practice test in their homework folder called Warrior Math.
Practice with your student, giving them only 2 minutes to complete the page.
The teacher will move your child up a level when your child is ready for the next set of facts.
We will also take a test each 9 weeks to determine if your child is at mastery. Your child will take the following tests, and have to master
-Fluently Add to 5
-Fluently Subtract to 5
-Mixed Fluency within 10
-Add within 20 (not timed)
-Subtract within 20 (not timed)
-Add & Subtract within 20 (not timed)
Fluency Flash Cards
1.OA.7 Time Assessed: 2nd 9 Weeks
Understand the meaning of the equal sign, and determine if equations involving addition and subtraction are true or false.
Activities at home without technology: (pictured left)
Place a number card on one side of an equal sign. Have your child count out that many counters. Then have him count out the same amount of counters for the other side of the equal sign. Discuss how these are now equal or the same. Do this with several different numbers.
To enhance this game, place two addition or subtraction sentences on both sides of the equal sign, then have your child determine if they are equal.
Online Games/Activities:
Addition Scale Toy Theater (balance equations)
Practice Test:
1.OA.8 Time Assessed: 2nd 9 Weeks
Determine the unknown whole number in addition and subtraction equations.
Strategies to help find the missing number:
*It is very important for the student to recognize during each problem that the biggest number goes at the end of addition problems, and the biggest number goes at the beginning for subtraction problems*
Part Part Whole
The students will draw the part part whole model (one of the top 2 examples in the picture above) and will determine the missing number by counting on.
Addition Strategies
The student can use one of these strategies to find the missing number.
Subtraction Strategies
The student can use one of these strategies to find the missing number.
Activities to do at home without technology:
Using Manipulatives:
Give the student an addition or subtraction problem with a part missing. The student will have to use one of the strategies above to find the missing number.
*with this model, it is suggested the students *COUNT ON* to the sum to find the missing number.