 Frequently accessed terms
 Set, Logic, Number Theory terms
 Whole number, Fraction, Decimal, Integer, Rational Number, Real Number, Complex Number terms
 Measurement, Standard Units, Length, Area, Volume terms
 Point, Line, Angle, Triangle, Quadrilateral, Polygon, Circle, Plane terms
 Polyhedron, Trigonometry, Vector, Transformation Geometry, Topology, Other Geometries
 Relation, Exponent, Equation, Function, Equation (2 variables), Polynomial, Rational Expression, Quadratic terms
 Coordinate System, Problem Solving, Statistics, Probability, Progression, Logarithm, Matrix, Calculus terms
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:

A+ Click : online math problems are the efforts of 66 highly motivated people from 22 countries.
 About Merlot and the
resources they provide.
 Series resources with links
 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.
 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]. ?
 African Teacher Education OER Network
South African Institute for Distance Education (SAIDE)
 From African Teacher Education OER Network Exploring What It Means To Do Mathematics. (download: unit1word.doc )
 Reading and Writing in the Mathematics Classroom
by Mark Freitag appearing in the The Mathematics Educator (Volume 8 Number 1 )
 What is ethnomathematics ?
 Teaching OER Mathematics using OER resources.
 Money as you Learn is a tool for Educators to Integrate Personal Finance into k12 mathematics.
 Interesting kindergarten level example:
KinderWeb by Brian Petro.
 Jenny Eather's A Maths Dictionary for Kids is a good source for lower grade levels.
 CoolMath.com dictionary has been on line since 1997.
 John Pages's Math Open Reference (Algebra/Geometry reference)
 James Sousa's videos
 Series resources with links
 Wikieducator's Math Glossary
 PBS LearningMedia *
 The National Council of Teachers of Mathematics Illuminations
 Check out the OER Commons website for ideas to develop or incorporate into your materials.
Please respect the TERMS OF USE statement that appears at the bottom of the sites this website links to.
Thank you.
About K12math.info
 Mission Statement
 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.
 FAQ (Frequently Asked Questions)
(updated January 2019)
 Terms of Use
 Citing the content
 Technical Notes
Available on touch screen devices
 The Future
 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: k12math(at)sbcglobal(dot)net
Thank you

Kindergarten (median age 5)
1. Standards
2. Key textbook content 20022016 (most frequently used order)
3. Key textbook content 19722015 (alphabetical order)
4. Key textbook content 19722015 (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 Handson Activities 
About AAAMATH
11. Illustrative Mathematics tasks
First grade (median age 6)
1. Standards
2. Key textbook content 20022016 (most frequently used order)
3. Key textbook content 19722015 (alphabetical order)
4. Key textbook content 19722015 (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 Handson Activities 
About AAAMATH
11. Illustrative Mathematics tasks
Second grade (median age 7)
1. Standards
2. Key textbook content 20022016 (most frequently used order)
3. Key textbook content 19722015(alphabetical order)
4. Key textbook content 19722015 (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 Handson Activities 
About AAAMATH
11. Illustrative Mathematics tasks
Third grade (median age 8)
1. Standards
2. Key textbook content 20022016 (most frequently used order)
3. Key textbook content 19722015 (alphabetical order)
4. Key textbook content 19722015 (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 Handson Activities 
About AAAMATH
11. Illustrative Mathematics tasks
Fourth grade (median age 9)
1. Standards
2. Key textbook content 20022016 (most frequently used order)
3. Key textbook content 19722015 (alphabetical order)
4. Key textbook content 19722015 (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 Handson Activities 
About AAAMATH
11. Illustrative Mathematics tasks
Fifth grade (median age 10)
1. Standards
2. Key textbook content 20022016 (most frequently used order)
3. Key textbook content 19722015 (alphabetical order)
4. Key textbook content 19722015 (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 Handson Activities 
About AAAMATH
11. Illustrative Mathematics tasks
Sixth grade (median age 11)
1. Standards
2. Key textbook content 20022016 (most frequently used order)
3. Key textbook content 19722015 (alphabetical order)
4. Key textbook content 19722015 (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 Handson Activities 
About AAAMATH
11. Illustrative Mathematics tasks
Seventh grade (median age 12)
1. Standards
2. Key textbook content 20022016 (most frequently used order)
3. Key textbook content 19722015 (alphabetical order)
4. Key textbook content 19722015 (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 Handson Activities 
About AAAMATH
11. Illustrative Mathematics tasks
Eighth grade (median age 13)
1. Standards
2. Key textbook content 20022016 (most frequently used order)
3. Key textbook content 19722015 (alphabetical order)
4. Key textbook content 19722015 (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 Handson Activities 
About AAAMATH
11. Illustrative Mathematics tasks
Ninth grade (median age 14)
1. Standards
2. Key textbook content 20022016 (most frequently used order)
3. Content w/CNX and CK12 2.0 version (alphabetical order)
4. Content w/CNX and CK12 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 20022016 (most frequently used order)
3. Content w/CNX and CK12 2.0 version (alphabetical order)
4. Content w/CNX and CK12 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 20022016 (most frequently used order)
3. Content w/CNX and CK12 2.0 version (alphabetical order)
4. Content w/CNX and CK12 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.
