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Elementary and Secondary School Mathematics

K-12math.info ( a 5 star Merlot education resource) celebrates its 10th year in serving the global education community by providing over 140,000 pieces of information and 4,200 links on 1,000 of the most common terms and concepts used in 222 elementary and secondary school mathematics textbooks and OER materials . All information is found without requiring the spelling of a single word, nor the need to sign in. Thank you. (August 2005-2015)

Links to: • Over 1000 links to AAAKnow (AAAMath) materials addedBangladesh's series Creating a K-5th grade OER series
Site statisticsTeaching OER MathematicsGlobal evaluation underway Why 1972 ?Content patternsAbout K-12math.info

- Note: www.K-12math.info is not a commercial site or funded by anyone; and is not affiliated with any other website of a similar name. -
  1. Frequently accessed terms

  2. Set, Logic, Number Theory terms


  3. Whole number, Fraction, Decimal, Integer, Rational Number, Real Number, Complex Number terms


  4. Measurement, Standard Units, Length, Area, Volume terms


  5. Point, Line, Angle, Triangle, Quadrilateral, Polygon, Circle, Plane terms


  6. Polyhedron, Trigonometry, Vector, Transformation Geometry, Topology, Other Geometries


  7. Relation, Exponent, Equation, Function, Equation (2 variables), Polynomial, Rational Expression, Quadratic terms


  8. Coordinate System, Problem Solving, Statistics, Probability, Progression, Logarithm, Matrix, Calculus terms


  9. Textbook Series Reviewed
  10. Series resources with links
  11. Reviewing Criteria

  12. The world at large:

    1. The Commonwealth Educational Media Centre for Asia in New Delhi recently (2013) released Quality Assurance Guidelines for Open Educational Resources: TIPS Framework Version 1.0 which provides a great deal of information on OER.

    2. ***** NEWS! Bangladesh's Elementary and Secondary School Math textbook series site is under re-construction. For those who downloaded the textbooks, the information on this site should still match the 2013 edition.

    3. African Teacher Education OER Network
      South African Institute for Distance Education (SAIDE)


    4. What is ethnomathematics ?


    These are a few sources for ideas that may help in your efforts to produce materials for your learning community. Please check and respect their TERMS OF USE.

  1. Interesting kindergarten level example:
    KinderWeb by Brian Petro.

  2. Key points in Writing a textbook. (Especially step 7)

  3. Check out the OER Commons website for ideas to develop or incorporate into your materials. In the - What do you want to search for today ? space enter what you are looking for.


  4. John Pages's Math Open Reference (Geometry reference)


  5. Jenny Eather's A Maths Dictionary for Kids good source for lower grade levels.


  6. Wikieducator's Math Glossary


  7. CoolMath.com has been on line since 1997.


  8. The National Council of Teachers of Mathematics Illuminations


  9. James Sousa's Arithmetic videos

    About K-12math.info

    1. Mission Statement

    2. Events

    3. Terms of Use

    4. Citing the content

    5. Technical

    6. The Future

    7. My Opinion

    Kindergarten (median age 5)
    1. Standards
    2. Key textbook content 1972-2015 (alphabetical order)
    3. Key textbook content 1972-2015 (most frequently used order)
    4. Curriculum Parameters
    5. Life outside the classroom
    6. Content by textbook in page number order
    First grade (median age 6)
    1. Standards
    2. Key textbook content 1972-2015 (alphabetical order)
    3. Key textbook content 1972-2015 (most frequently used order)
    4. Curriculum Parameters
    5. Life outside the classroom
    6. Content by textbook in page number order
    Second grade (median age 7)
    1. Standards
    2. Key textbook content 1972-2015(alphabetical order)
    3. Key textbook content 1972-2015 (most frequently used order)
    4. Curriculum Parameters
    5. Life outside the classroom
    6. Content by textbook in page number order
    Third grade (median age 8)
    1. Standards
    2. Key textbook content 1972-2015 (alphabetical order)
    3. Key textbook content 1972-2015 (most frequently used order)
    4. Curriculum Parameters
    5. Life outside the classroom
    6. Content by textbook in page number order
    Fourth grade (median age 9)
    1. Standards
    2. Key textbook content 1972-2015 (alphabetical order)
    3. Key textbook content 1972-2015 (most frequently used order)
    4. Curriculum Parameters
    5. Life outside the classroom
    6. Content by textbook in page number order
    Fifth grade (median age 10)
    1. Standards
    2. Key textbook content 1972-2015 (alphabetical order)
    3. Key textbook content 1972-2015 (most frequently used order)
    4. Curriculum Parameters
    5. Life outside the classroom
    6. Content by textbook in page number order
    Sixth grade (median age 11)
    1. Standards
    2. Key textbook content 1972-2015 (alphabetical order)
    3. Key textbook content 1972-2015 (most frequently used order)
    4. Curriculum Parameters
    5. Life outside the classroom
    6. Content by textbook in page number order
    Seventh grade (median age 12)
    1. Standards
    2. Key textbook content 1972-2015 (alphabetical order)
    3. Key textbook content 1972-2015 (most frequently used order)
    4. Curriculum Parameters
    5. Life outside the classroom
    Eighth grade (median age 13)
    1. Standards
    2. Key textbook content 1972-2015 (alphabetical order)
    3. Key textbook content 1972-2015 (most frequently used order)
    4. Curriculum Parameters
    5. Life outside the classroom
    Ninth grade (median age 14)
    1. Standards
    2. Content w/CNX and CK-12 2.0 version (alphabetical order)
    3. Content w/CNX and CK-12 2.0 version (most frequently used order)
    4. Curriculum Parameters
    5. Life outside the classroom
    Tenth grade (median age 15)
    1. Standards
    2. Content w/CNX and CK-12 2.0 version (alphabetical order)
    3. Content w/CNX and CK-12 2.0 version (most frequently used order)
    4. Curriculum Parameters
    5. Life outside the classroom
    Eleventh grade (median age 16)
    1. Standards
    2. Content w/CNX and CK-12 2.0 version (alphabetical order)
    3. Content w/CNX and CK-12 2.0 version (most frequently used order)
    4. Curriculum Parameters
    5. Life outside the classroom


    Please respect the TERMS OF USE statement
    that appears at the bottom of the sites this website links to.
    Thank you.



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