This post has all of our free school textbooks for Grade 9, awesome free high-school OER textbooks for classroom or homeschool use, enjoy!
English Language and Arts Textbooks Grade 9
This section includes all our Grade 9 textbooks in English (EFL, ESL, EAL), and all mediums of arts including music.
Writing on the Run Grades 7-9 for British Columbia is licensed under Creative Commons Non-Commercial (CC-BY-NC). This set of four school textbooks covers the following subjects Constructing Sentences, Parts of Speech, Punctuation, Writing Style and Process.
Steering The Course for Grades 9-12 Strategies for Reading, Researching, Writing and Other Essential Skills: Gathering, Organizing, and Presenting Information.
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Engage NY – Grade 9 English Resources US CCSS 
Grade 9 English Language resources, lesson plans, reading and writing exercises and questions, released as OER in CC-BY-NC. Note while the lesson plans in this content are free, many texts they are based on are copyright and have to be purchased or obtained from a library. While there are some free copies around, the texts are copyright so cannot be reproduced or linked here.
https://www.engageny.org/resource/grade-9-english-language-arts
Grade 9 ESL Textbooks India *
Grade 9 English Textbook, Beehive, and supplementary reader Moments, for the Indian national syllabus Class 9, released as OER in CC-BY-NC.
Grade 9 Beehive textbook – Download zip file of pdf Chapters
Grade 9 Moments Supplementary Reader – Download zip file of pdf Chapters
All NCERT Textbooks Read Online – Pathshala
Punjab – Grade 9 English Activity Book*
A well presented Grade 9 to 10 English Language activity textbook from the Government of The Punjab. These resources make great ESL printables too.*
Grade 9-10 English textbook from Punjabi – pdf
*Note: ELA resources from countries that are bilingual or where English is not the national language may differ from those where English is a national language curriculum, however, student English levels can vary significantly too, you can always look one or two grades up or down to find resources that fit your needs.
Mathematics Textbooks Grade 9
This section contains all our grade 9+ maths textbooks.
Grade 9 Maths RSA Syllabus 
These Grade 9 Maths books are created by Siyavula for contribution to open education and are based on the Grade 9 Mathematics syllabus in South Africa.
Mathematics Grade 9A pdf
Mathematics Grade 9B pdf
Mathematics Grade 9 Read Online all
Secondary Mathematics I – Utah Syllabus
These secondary mathematics textbooks cover the maths syllabus for Utah, in the first year of secondary school, that is Grades 9+. This resource is created by Utah Education Network open textbooks project for contribution to open education, they are licensed CC-BY-NC. The books are available as separate chapter downloads in ordinary level as English and Spanish, and honours level, both have an English teachers version.
Secondary Mathematics I – Utah Education Network
CK-12 Online Textbooks High School Maths
This is a comprehensive selection of online lessons (explanations, images, worked examples, and interactive quizzes) for Grade 7 Maths. CK-12 provides these 7th Grade OER maths resources for improving education. The flexbooks provide an amazing customizable and interactive resource, including quizzes that automatically adjust for students level. The resource can also be downloaded to an offline library for use offline, perfect for K-12 learning in classrooms or homeschool.
CK-12 Algebra I High School Textbook Online
CK-12 Algebra II High School Textbook Online
CK-12 Geometry High School Textbook Online
CK-12 Pre-Calculus High School Textbook Online
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Science Textbooks Grade 9
This section includes all grade 9+ sciences, including general science, earth sciences, physics, chemistry, biology or life sciences.
This Earth Science Open Educational Resource (OER) textbook is written specifically for students to have a reputable source for them to obtain materials and information aligned to Utah Earth Science Standards for Grade 9, or for student’s first year Earth Science (Earth Science I) in high school.
This Biology Open Educational Resource (OER) textbook is written specifically for students to have a reputable source for them to obtain materials and information aligned to Utah Biology Standards for Grade 9, or for student’s first year Biology (Biology I) in high school.
Grade 9 Science RSA Syllabus 
These Grade 9 Science books are created by Siyavula for contribution to open education and are based on the Grade 9 Natural Sciences syllabus in South Africa.
Natural Science Grade 9A pdf
Natural Science Grade 9A Teachers Guide
Natural Science Grade 9B pdf
Natural Science Grade 9B Teachers Guide
Natural Science Grade 9A and B epub CC-BY Unbranded
The following textbooks are for applied or engineering sciences for Grade 9:
Technology Grade 9 All – 2017 Edition – pdf textbook
Technology Grade 9 All – 2017 Teachers Guide – pdf textbook
Technology Grade 9 Read Online
CK-12 High School Online Textbooks Science
This is a comprehensive selection of online lessons (explanations, images, worked examples, and interactive quizzes) for biology, physics, and chemistry for high school. CK-12 provides these resources for high school science for improving education. The flexbooks provide an amazing customizable and interactive resource that can also be used offline.
CK-12 High School Biology Science Textbook Online
CK-12 High School Chemistry Science Textbook Online
CK-12 High School Physics Science Textbook Online
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Grade 9 Other Subjects
All grade 9+ social studies, geography, history, and other subject textbooks.
High School Studies Michigan Syllabus 
The following high school textbooks are available from Michigan Open created by Michigan Open Textbooks Project for contribution to open education resources and by sponsorship from the Michigan State Education Department.
High School Textbooks (Grades 9 to 12) – World History
pdf textbook – http://textbooks.wmisd.org/Downloads/HSWorld/HSWorld.pdf
ibooks (may not be available in all countries) – http://itunes.apple.com/us/book/id1278774304
Great public service! Thank you!
Great material .
Awesome collection or school resources, thank-you!