Grade 2 Lesson plan
Barnhill's Model Water Tower: Measuring Height in Inches
A 50-minute grade 2 lesson in which students raise a model water tower, measure how far the water reaches, and solve height problems in inches within 100.
Common Core Math · Grade 2
2.OA.A.1 Solve one- and two-step word problems within 100
Use addition and subtraction within 100 to solve one- and two-step word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem.
Why water teaches this standard well
Two-step problems ask how many total gallons two households used after one added a rain barrel and the other filled a pool, combining two changes into a single running total. Comparing water use between neighbors gives every unknown position in this standard a real household number behind it.
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.
20 materials aligned to 2.OA.A.1
Lesson plans
Grade 2 Lesson plan
Packing Water for Room 9's Trip to Tarnbrook Park
A grade 2 health lesson planning drinking water for a field trip with no fountain, using bottle and cup counts within 100 and a note home.
Grade 2 Lesson plan
Pebble Ridge Picks the Street That Gets New Pipes
A 40-minute grade 2 civics lesson where students hear two streets ask for the same pipe repair money, vote as a class, and compare the counts within 100.
Worksheets
Grade 2 Worksheet
Kestrel Landing's Splash Blocks: A Grade 2 Line Plot Worksheet
Students plot twelve measured splash block lengths on a line plot marked in whole inches, then read the plot to answer count and compare questions.
Grade 2 Worksheet
The Creek Watcher's Litter Log at Duckpond Park
A grade 2 careers worksheet in which students read one week of a fictional creek watcher's litter log, bar-graph it, and add and subtract within 100.
Grade 2 Worksheet
Drip Patrol at Harborlight School: A Line Plot Worksheet
Grade 2 students plot a fictional school water worker's jar-depth measurements from ten drippy fountains on a line plot and read totals from it.
Grade 2 Worksheet
Tidewell Art Room's Dripping Tap: A Drip Catcher Worksheet
A grade 2 worksheet in which students read five days of test data from two drip catcher designs, add and subtract within 100, and choose the better design.
Grade 2 Worksheet
The Ferris Family's Shower Timer on Dogwood Terrace
A grade 2 worksheet on shorter showers: students add and subtract within 100 using one family's Monday shower minutes and a five-minute goal.
Grade 2 Worksheet
Nora's Rain Barrel: A Grade 2 Adding and Subtracting Worksheet
A grade 2 social studies worksheet where students add and subtract gallons in a rain barrel across a dry-town week and explain why saving rain is a smart choice.
Grade 2 Worksheet
Storm Drain Patrol at Juniper Hill: A Grade 2 Word Problem Worksheet
Grade 2 students solve addition and subtraction word problems within 100 using a week of storm-drain-clearing counts from Juniper Hill's Storm Drain Patrol club.
Grade 2 Worksheet
Marigold Lane's Water-Saving Week: A Tally and Bar Graph Worksheet
A grade 2 worksheet where students turn a week of water-saver tally marks into a bar graph and solve addition and subtraction word problems about the data.
Math problem sets
Grade 2 Math problem set
Water Deliveries to Quillmoor Crossing: A Grade 2 Problem Set
A town's well pump is down for a week, and eight linked problems track the cases of water delivered each day against a 200-case goal.
Grade 2 Math problem set
Pebblewood's Rain Catcher Contest: A Grade 2 Bar Graph Set
A grade 2 problem set built on four teams' rain catcher results, with bar graph reading and one- and two-step add and subtract problems within 100.
Grade 2 Math problem set
Briar Lane Elementary's Rain Gauge Diary: A Grade 2 Math Set
A grade 2 math problem set where students total, compare, and graph a week of whole-inch rain gauge readings recorded on the school playground.
Labs & experiments
Grade 2 Lab / experiment
Two Thermometers and a Paper Fan: A Grade 2 Sweat Cooling Lab
Grade 2 students fan a dry thermometer and a wet-wrapped one, graph how a damp hand felt, and use the results to explain how sweat cools skin and why we drink after.
Grade 2 Lab / experiment
Hard Ground or Grassy Ground? A Grade 2 Runoff Test
A grade 2 lab where students compare rainwater runoff collected from a foil-lined tray and a soil-filled tray to see which surface absorbs more water.
Classroom activities
Grade 2 Classroom activity
Downspout Dash at Harrowgate: A Grade 2 Rain Barrel Board Game
Teams move a token along a roof-to-rain-garden path, drawing cards that add or take gallons, and keep a running barrel total within 100 on a record sheet.
Grade 2 Classroom activity
Gravensford Pond in Four Seasons: A Solid or Liquid Sort
Grade 2 groups sort twelve cards about water around one pond across four seasons into solid and liquid, then compare the two totals by subtracting.
Grade 2 Classroom activity
Amber Marsh Creek Cleanup Relay: A Grade 2 Sorting and Counting Game
A 30-minute grade 2 relay where two teams race to sort litter picture cards from Amber Marsh Creek into Recycle or Trash bins, then compare their correct-sort totals.
Graphic organizers
Grade 2 Graphic organizer
Nettleford Bend Creek Cleanup: A Grade 2 Two-Step Problem Organizer
A four-column frame walks grade 2 students from what they know through two number sentences to the answer, using three creek cleanup word problems.