English | Español | English/Français |

Elementary and Secondary School Mathematics
( k-12math.info - Information )

This 5 star Merlot sustaining open access education resource has been honored twice (2016/2018) by the United Nations

Please note some websites that K-12math.info link to, do not display because of the browser being used.

Addition of: Whole Numbers • Fractions • Decimals • Integers • Rational Numbers • Real Numbers • Complex Numbers

  1. Temporarily off line while being updated
    and new information being added:
    NCERT materials (1-12th grade) (India),
    Open Textbooks by Siyavula (7-12) (South Africa),
    Ukuqonda Institute math (4-9) (South Africa).


  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. ****** NEW (May 27, 2019) *******
    Complete list of k-12th grade mathematics terms referenced in this website
    With Google Translator provided.



    Reviewing Criteria - or - Textbook Series Used

    Numbers 1 through 8 above provide information on 1 000 mathematical terms used in elementary and secondary school mathematics student textbooks and OER materials.
    How is it used to create new materials?


    Global Resources:

      Occupations Guide with mathematics requirements.

    1. A+ Click : online math problems are the efforts of 66 educators from 22 countries.

    2. About Merlot and the resources they provide.

    3. Series resources with links.

    4. 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.

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

    6. From African Teacher Education OER Network Exploring What It Means To Do Mathematics. (download: unit-1-word.doc )

    7. Reading and Writing in the Mathematics Classroom by Mark Freitag appearing in the The Mathematics Educator (Volume 8 Number 1 )

    8. Mathematical Association of America examines a number of historical mathematics manuscripts from different countries.

    9. What is ethnomathematics ?

    10. Teaching OER Mathematics is an OER resource.

    11. Money as you Learn is a tool for Educators to Integrate Personal Finance into k-12 mathematics.

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

    13. Jenny Eather's A Maths Dictionary for Kids is a good source for lower grade levels.

    14. CoolMath.com dictionary has been on line since 1997.

    15. John Pages's Math Open Reference (Algebra/Geometry reference)

    16. James Sousa's videos

    17. Series resources with links

    18. Wikieducator's Math Glossary

    19. PBS LearningMedia *

    20. The National Council of Teachers of Mathematics Illuminations

    21. Check out the OER Commons website for ideas to develop or incorporate into your materials.


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



    About K-12math.info

    1. Mission Statement

    2. Events
      2018 honors from the United Nations
      United Nations' WSIS Prizes Ambassador
      A+ Click, PBS, AAAMATH Hands on Activities added.
      2016 honors from the United Nations
      5 star Merlot educational resource.
      Singapore Math added.
      Khan Academy links updated.
      13 years of serving math education.

    3. FAQ (Frequently Asked Questions)

    4. Terms of Use

    5. Citing the content

    6. Technical Notes

    7. The Future

    8. Opinions
      What others think.
      Thanks to many who helped this Website.
      Why 1972 ? • Content patterns.
    Kindergarten (median age 5)
    1. Standards
    2. Key textbook content 2002-2016 (most frequently used order)
    3. Key textbook content 1972-2015 (alphabetical order)
    4. Key textbook content 1972-2015 (most frequently used order)
    5. Curriculum Parameters
    6. Life outside the classroom
    7. Content by textbook in page number order
    8. ----
    9. PBS Kindergarten level - About PBS LearningMedia *
    10. AAAMATH Hands-on Activities - About AAAMATH
    11. Illustrative Mathematics tasks
    First grade (median age 6)
    1. Standards
    2. Key textbook content 2002-2016 (most frequently used order)
    3. Key textbook content 1972-2015 (alphabetical order)
    4. Key textbook content 1972-2015 (most frequently used order)
    5. Curriculum Parameters
    6. Life outside the classroom
    7. Content by textbook in page number order
    8. A+Click : Online Math Problems - About A+Click
    9. PBS Grade 1 - About PBS LearningMedia *
    10. AAAMATH Hands-on Activities - About AAAMATH
    11. Illustrative Mathematics tasks
    Second grade (median age 7)
    1. Standards
    2. Key textbook content 2002-2016 (most frequently used order)
    3. Key textbook content 1972-2015(alphabetical order)
    4. Key textbook content 1972-2015 (most frequently used order)
    5. Curriculum Parameters
    6. Life outside the classroom
    7. Content by textbook in page number order
    8. A+Click : Online Math Problems - About A+Click
    9. PBS Grade 2 - About PBS LearningMedia *
    10. AAAMATH Hands-on Activities - About AAAMATH
    11. Illustrative Mathematics tasks
    Third grade (median age 8)
    1. Standards
    2. Key textbook content 2002-2016 (most frequently used order)
    3. Key textbook content 1972-2015 (alphabetical order)
    4. Key textbook content 1972-2015 (most frequently used order)
    5. Curriculum Parameters
    6. Life outside the classroom
    7. Content by textbook in page number order
    8. A+Click : Online Math Problems - About A+Click
    9. PBS Grade 3 - About PBS LearningMedia *
    10. AAAMATH Hands-on Activities - About AAAMATH
    11. Illustrative Mathematics tasks
    Fourth grade (median age 9)
    1. Standards
    2. Key textbook content 2002-2016 (most frequently used order)
    3. Key textbook content 1972-2015 (alphabetical order)
    4. Key textbook content 1972-2015 (most frequently used order)
    5. Curriculum Parameters
    6. Life outside the classroom
    7. Content by textbook in page number order
    8. A+Click : Online Math Problems - About A+Click
    9. PBS Grade 4 - About PBS LearningMedia *
    10. AAAMATH Hands-on Activities - About AAAMATH
    11. Illustrative Mathematics tasks
    Fifth grade (median age 10)
    1. Standards
    2. Key textbook content 2002-2016 (most frequently used order)
    3. Key textbook content 1972-2015 (alphabetical order)
    4. Key textbook content 1972-2015 (most frequently used order)
    5. Curriculum Parameters
    6. Life outside the classroom
    7. Content by textbook in page number order
    8. A+Click : Online Math Problems - About A+Click
    9. PBS Grade 5 - About PBS LearningMedia *
    10. AAAMATH Hands-on Activities - About AAAMATH
    11. Illustrative Mathematics tasks
    Sixth grade (median age 11)
    1. Standards
    2. Key textbook content 2002-2016 (most frequently used order)
    3. Key textbook content 1972-2015 (alphabetical order)
    4. Key textbook content 1972-2015 (most frequently used order)
    5. Curriculum Parameters
    6. Life outside the classroom
    7. Content by textbook in page number order
    8. A+Click : Online Math Problems - About A+Click
    9. PBS Grade 6 - About PBS LearningMedia *
    10. AAAMATH Hands-on Activities - About AAAMATH
    11. Illustrative Mathematics tasks
    Seventh grade (median age 12)
    1. Standards
    2. Key textbook content 2002-2016 (most frequently used order)
    3. Key textbook content 1972-2015 (alphabetical order)
    4. Key textbook content 1972-2015 (most frequently used order)
    5. Curriculum Parameters
    6. Life outside the classroom
    8. A+Click : Online Math Problems - About A+Click
    9. PBS Grade 7 - About PBS LearningMedia *
    10. AAAMATH Hands-on Activities - About AAAMATH
    11. Illustrative Mathematics tasks
    Eighth grade (median age 13)
    1. Standards
    2. Key textbook content 2002-2016 (most frequently used order)
    3. Key textbook content 1972-2015 (alphabetical order)
    4. Key textbook content 1972-2015 (most frequently used order)
    5. Curriculum Parameters
    6. Life outside the classroom
    7. A+Click : Online Math Problems - About A+Click
    8. PBS Grade 8 - About PBS LearningMedia *
    9. AAAMATH Hands-on Activities - About AAAMATH
    11. Illustrative Mathematics tasks
    Ninth grade (median age 14)
    1. Standards
    2. Key textbook content 2002-2016 (most frequently used order)
    3. Content w/CNX and CK-12 2.0 version (alphabetical order)
    4. Content w/CNX and CK-12 2.0 version (most frequently used order)
    5. Curriculum Parameters
    6. Life outside the classroom
    7. A+Click : Online Math Problems - About A+Click
    8. PBS Grade 9 - About PBS LearningMedia *
    11. Illustrative Mathematics Algebra 1
    Tenth grade (median age 15)
    1. Standards
    2. Key textbook content 2002-2016 (most frequently used order)
    3. Content w/CNX and CK-12 2.0 version (alphabetical order)
    4. Content w/CNX and CK-12 2.0 version (most frequently used order)
    5. Curriculum Parameters
    6. Life outside the classroom
    7. A+Click : Online Math Problems - About A+Click
    8. PBS Grade 10 - About PBS LearningMedia *
    11. Illustrative Mathematics Geometry
    Eleventh grade (median age 16)
    1. Standards
    2. Key textbook content 2002-2016 (most frequently used order)
    3. Content w/CNX and CK-12 2.0 version (alphabetical order)
    4. Content w/CNX and CK-12 2.0 version (most frequently used order)
    5. Curriculum Parameters
    6. Life outside the classroom
    7. A+Click : Online Math Problems - About A+Click
    8. PBS Grade 11 - About PBS LearningMedia *
    11. Illustrative Mathematics Algebra 2
    * As most of the PBS learning items under each grade level maybe used for multiple grade levels - determine the appropriateness of the learning item before using.

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

Note: www.K-12math.info is not a commercial site or funded by any organization. It is not affiliated with any website of a similar name.
The views expressed in this site are those of its creator: Jim Kelly
Send comments and questions to: k-12math(at)sbcglobal(dot)net

©1972 (paper), 1985 (floppy disks - APPLE II/PC), 2005-2019(www) Jim Kelly - All Rights Reserved.