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Elementary and Secondary School Mathematics
(k-12math.info - Information )
United Nations again honors K-12math.info

Reminder k-12math.info is available on touch screen devices like Apple's IPad.

Addition of: Whole Numbers Fractions Decimals Integers (language test site) Rational Numbers Real Numbers Complex Numbers

  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. 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:

    1. A+ Click : online math problems are the efforts of 67 highly motivated people from 23 countries.

    2. Series resources with links

    3. 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.

    4. Bangladesh's 2013 Elementary and Secondary School Math open access textbook series has been taken off line. For those who downloaded the textbooks, the information on this site should still match the 2013 edition.
      For the school year 2009, Bangladesh's National Curriculum and Textbook Board(NCTB) produced an textbook entitled, 'Elementary Mathematics' for the students of Class Five [grade five].
      ?

    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. What is ethnomathematics ?

    8. Teaching OER Mathematics using OER resources.

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

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

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

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

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

    14. James Sousa's videos

    15. Series resources with links

    16. Wikispaces provides activities by grade level
      Note: this website will begin closing down July 31,2018.

    17. Wikieducator's Math Glossary

    18. PBS LearningMedia *

    19. The National Council of Teachers of Mathematics Illuminations

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


    21. 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.
      UN honors this 5 star Merlot educational resource.
      Singapore Math added.
      Khan Academy links updated.
      13 years of serving math education.

    3. FAQ (Frequently Asked Questions)
      (updated November 18, 2018)

    4. Terms of Use

    5. Citing the content

    6. Technical Notes
    7. Available on touch screen devices

    8. The Future

    9. Opinions
      What others think.
      Thanks to many who helped this Website.
      Why 1972 ? • Content patterns.



    Language Notes:
    Please note efforts are being made to serve a larger number of language communities. Hopefully Google translations will help. Only a sampling of screens have been selected. Your comments would be appreciated. (Efforts begun November 10, 2018.)
    Send Comments to: k-12math(at)sbcglobal(dot)net
    Thank you
    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), 2005-2018(www) Jim Kelly - All Rights Reserved.