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    Oregon 3rd Grade Curriculum & Standards Guide

    How Oregon's third grade standards line up with Third Grade.

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    Oregon standards

    Math

    Oregon Mathematics Standards (2021)

    Based on Common Core · adopted 2021

    Adopted October 21, 2021. Grade 3 keeps Common Core content but regroups it: measurement and geometry are merged (3.GM.C.7) and data moves to a Data Reasoning domain (3.DR) in which children pose their own questions and gather data. Line plots and half- and quarter-inch measuring appear in the state's guidance for 3.DR.A.1, not in the standard itself.

    Official standards

    English Language Arts

    Oregon English Language Arts and Literacy Standards (2019)

    Based on Common Core · adopted 2019

    The June 2019 standards apply in 2026-27; new standards adopted June 18, 2026 are to be implemented in 2028-29 and use codes like ELA.3.RL.1. The 2019 standards follow Common Core with the grade written first (3.RL.1, 3.RF.3a). Grade 3 matches what Third Grade teaches except 3.RI.6, which asks for firsthand and secondhand accounts.

    Official standards

    Science

    Oregon K-12 Science Standards (2022)

    National science standards · adopted 2022

    Adopted June 16, 2022 with the same expectations as the national science standards, so Grade 3 matches Third Grade's science list. Codes use periods (3.PS2.1) and engineering design is numbered by grade (3.ETS1.1 to 3.ETS1.3). A revision is planned, but the state's pages give different dates for it.

    Official standards

    Social Studies

    Oregon K-12 Social Science Standards (2024)

    State's own standards

    The 2024 standards, with ethnic studies built in, are required from 2026-27. Grade 3 theme is 'Our Community and Beyond', including Oregon's regions, natural resources, tribal lands, state offices and taxes. Codes look like 3.G.HE.6.

    Official standards

    Standard-by-standard crosswalk

    See every national third grade standard matched to Oregon's own codes.

    • Math: 17 same · 20 close · 0 partly · 0 not in Grade 3
    • English Language Arts: 77 same · 12 close · 0 partly · 1 not in Grade 3
    • Science: 18 same · 0 close · 0 partly · 0 not in Grade 3
    Open the Oregon crosswalk

    Grade 3 differences

    1. In Oregon

      ELA: tell a firsthand account from a secondhand account of the same event or topic (3.RI.6). Oregon's standard does not ask children to separate their own point of view from the author's, which is what Third Grade teaches here.

      Suggested swap in Third Grade

      ELA Week 24 (author's purpose and point of view): add a day comparing a firsthand account, such as a diary entry or letter, with a secondhand account of the same event.

    2. In Oregon

      Math: children generate their own questions about the classroom, school or community and collect data to answer them with scaled picture and bar graphs (3.DR.A.1).

      Suggested swap in Third Grade

      Math Week 35 (scaled picture and bar graphs): let your child write the survey question, collect answers from family or neighbors, and graph them.

    3. In Oregon

      Social studies: compare Oregon's regions and analyze Oregon's natural resources and how people use them (3.G.HE.6, 3.G.HE.7).

      Suggested swap in Third Grade

      Social Studies Week 4 (landforms, water and resources) and Week 17 (state project): choose Oregon and compare its regions (coast, valley, Cascades, high desert) and resources.

    4. In Oregon

      Social studies: use latitude and longitude to locate tribal lands, environmental regions and counties of Oregon and the Pacific Northwest (3.G.GR.2).

      Suggested swap in Third Grade

      Social Studies Week 3 (maps and globes): add a day on latitude and longitude, then find Oregon's counties and tribal lands on a map.

    5. In Oregon

      Social studies: identify state offices, leaders and their functions (3.C.PI.1) and explain how taxes pay for public goods (3.E.ES.2).

      Suggested swap in Third Grade

      Social Studies Weeks 19-20 (local government; three branches): add the governor's office and other state offices, and talk about which services taxes pay for.

    6. In Oregon

      Social studies: explain the difference between allies and bystanders when someone is targeted for who they are (3.C.IR.2), and recognize that identity and experience lead people to see the same event differently (3.C.IR.3).

      Suggested swap in Third Grade

      Social Studies Week 21 (citizens' rights and responsibilities): add a discussion of standing up for someone who is treated unfairly, and of how two people can see one event differently.

    7. In Oregon

      Social studies: weigh theories about how people first came to North and South America, using archaeological evidence (3.G.MM.3).

      Suggested swap in Third Grade

      Social Studies Week 6 (Native peoples): add a short look at how archaeologists study the first people in the Americas, including sites in the Pacific Northwest.

    Grade 3 public-school test

    Oregon Statewide Assessment System (OSAS), Grade 3 ELA and mathematics

    ODE's homeschool testing page says homeschooled students test at the end of Grades 3, 5, 8 and 10, with listed exceptions; check the page for current details.

    About this test

    Shown for context. Homeschool testing rules are separate; see below.

    Homeschool rules

    Check your state's current homeschool rules with its education department. Oregon homeschool page

    Sources

    Verified 2026-10-08