Grade 1 Lesson plan
Melting Milburn School's Snow Cups: A Grade 1 Water Cycle Lesson
Students pack snow to a marked line in a clear cup, let it melt, and measure with cubes how far the line drops to find the water stored in the snow.
Common Core Math · Grade 1
1.OA.A.1 Solve add-to, take-from, and compare word problems within 20
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.
Why water teaches this standard well
Word problems ask how many cups of water are needed once more thirsty campers arrive, or how many gallons are left in a cooler after some are poured out, with the unknown in different positions. Water pitchers and drinking fountains give a concrete, refillable context for every problem type this standard requires.
Materials tagged with this code are written to the full standard , and each carries a written note explaining the alignment. See how we review materials.
24 materials aligned to 1.OA.A.1
Lesson plans
Grade 1 Lesson plan
Dry Pot or Damp Pot at Norbrook School: A Grade 1 Lesson
Students spoon water into a dry pot and a damp pot, counting spoons until the first drip, to find out why the garden club's daily watering runs to waste.
Grade 1 Lesson plan
Clover Row's Bucket Car Wash: A Grade 1 Word Problem Lesson
A 40-minute grade 1 lesson using a neighborhood bucket car wash to build add-to, take-from, compare, and missing-part word problems within 20.
Grade 1 Lesson plan
Closing One Valve on the Cloverdike School Line
A 45-minute grade 1 lesson where students run a two-branch bottle model with clothespin valves, then solve within-20 problems about who loses water during a repair.
Grade 1 Lesson plan
Zinnia Court's Tall Tank Test: A Grade 1 Water Tower Lesson
A grade 1 lesson where students build block-and-cup water towers for a make-believe town, test whether height sends water farther, and practice subtraction within 20.
Worksheets
Grade 1 Worksheet
The New Bottle Filler at Waxwing School: A Grade 1 Worksheet
A grade 1 careers worksheet in which students add and subtract within 20 and tell apart the jobs of a town water worker and a school plumber.
Grade 1 Worksheet
Three Rain Containers at Quillspur School: A Grade 1 Worksheet
A wide pan, a narrow jar, and a cup sat out in the same rain; students read the cube depths and work out why the widest one did not fill deepest.
Grade 1 Worksheet
One Downspout for Twelve Roof Squares at Wrentham School
Students count the squares on two school roofs, work out the cups each downspout delivers, and explain why gentle rain pours hard out of one pipe.
Grade 1 Worksheet
Cobblewick School Water-Saving Paper Quilt: A Grade 1 Worksheet
Twelve grade 1 art and place-value items about a hallway paper quilt, with rows of ten squares to count, a border pattern, and one square to design.
Grade 1 Worksheet
Barley Field's Flooded Bus Lane: A Grade 1 Soak-Up Test Worksheet
A grade 1 worksheet using tray test data from blacktop and grass so students compare run-off amounts and add and subtract within 20 to fix a flooded bus lane.
Grade 1 Worksheet
Damson Lane's Cold Jar Test: A Grade 1 Water Catcher Worksheet
A grade 1 worksheet using drop counts from a cold jar and a room jar so students subtract within 20 and design a collar that guides drops into the tray.
Grade 1 Worksheet
A Fountain Spout for Quince Hollow: A Grade 1 Height Worksheet
A grade 1 worksheet where students order three drinking fountain spouts by the height of their water arc in cubes and pick the spout that fits a first grader.
Grade 1 Worksheet
The Lund Family's Kitchen Tap on Ivywood Court
A grade 1 health and consumer worksheet on kitchen water habits: seven read-aloud word problems within 20, two choice items, and one writing prompt.
Grade 1 Worksheet
The Applegate Town Map: Why the School Sits on the Hill
A grade 1 geography worksheet with a nine-place map list from a fictional town, counting and comparing items within twenty, and questions about high and low ground.
Grade 1 Worksheet
Sparrow Creek Camp's Cooler: A Grade 1 Add and Subtract Worksheet
A grade 1 math worksheet where students solve add-to, take-from, put-together, and compare word problems about cups of water poured from a summer camp cooler.
Grade 1 Worksheet
Follow the Pipe to Tanager Elementary's Fountain: A Worksheet
A grade 1 worksheet where students trace water's path from tower to fountain, tally a classroom drink-source survey, and solve simple counting word problems.
Math problem sets
Grade 1 Math problem set
Tumbleweed Ridge Field Day: A Grade 1 Water Stand Problem Set
A grade 1 problem set on three field day water stands where students total spill tallies across three categories and subtract within 20 to compare the designs.
Grade 1 Math problem set
Briar Patch Garden's Rain Barrel: A Grade 1 Word Problem Set
A grade 1 math problem set that follows one rain barrel through a week of filling and draining, building addition and subtraction word problems within 20 in sequence.
Grade 1 Math problem set
Room 4's Reusable Bottle Count at Hazel Grove: A Problem Set
A grade 1 math problem set where students add and subtract a classroom's daily water-bottle refill counts to find weekly totals and comparisons.
Grade 1 Math problem set
Room 14's Tap Tally: A Grade 1 Addition and Subtraction Set
Eight grade 1 addition and subtraction problems within 20, built from one classroom's three-category tally chart of hand-washing water-saving checks.
Classroom activities
Grade 1 Classroom activity
Swanmere Marsh's Number Line Walk: A Grade 1 Rain and Sun Game
A 30-minute grade 1 activity where students walk a floor number line to model rain filling and sun drying a marsh pool, solving word problems within 20.
Grade 1 Classroom activity
Clean Creek Patrol at Larkspur Creek: A Grade 1 Activity
A grade 1 activity where two teams collect litter near a model creek, count what they gathered, and add their totals together.
Grade 1 Classroom activity
Water Helpers Day at Fairview: A Grade 1 Careers Station Activity
A grade 1 station activity where students rotate through a pipe check and a meter check to learn about two real water-sector jobs and solve a small subtraction problem.
Graphic organizers
Grade 1 Graphic organizer
Burdock Pond Cleanup: A Grade 1 Part-Part-Whole Frame
A grade 1 part-part-whole organizer for litter-bag word problems, with a labeled frame for the two parts, the whole, the number sentence, and the answer.