There are tonnes of resources, both free and affordable for Homeschool families. I have compiled a list below and update this page regularly. 
*Note-This site contains affiliate links to products. I may receive a commission for purchases made through these links at no cost to you.

Books about Homeschooling
Viral Learning: Reflections on the Homeschooling Life – Mary Griffiths
Dumbing us down – John Taylor Gatto
Weapons of Mass Instruction – John Taylor Gatto
The Brave Learner –  Julie Bogart
The Call of the Wild and Free: Reclaiming Wonder in Your Child’s Education – Ainsley Arment
A Gracious Space (4 different editions) – Julie Bogart
The Well Trained Mind – Susan Wise Bauer 

Books (Readers)
If you are looking for readers for the kiddos that are FACTUAL, I recommend the following.
Who Was Book Series
Horrible Histories
Horrible Science
Horrible Geography
You wouldn’t want to be a Book Series
(Free worksheets/resources to along with the You wouldn’t want to be Series can be found HERE)
Scholastic Biographies
Little People, Big Dreams Series
DK Biographies

Nature/Nature Journaling
A collection of beautifully written books with activity suggestions.
Birds of the Air
Insect Life
By Pond and River
Plant life in Field and Garden
A collection of colourfully illustrated nature books; farm anatomy, nature anatomy and food anatomy
Julia Rothman collection
Bring a little nature home with this Ant farm!  Perfect for the younger ones to observe the wonderful world of ants. (Ants have to be ordered separately and only shipped within the US but we used ants in our locality)
Ant Farm Kit

English/Language Arts including Grammar.
A wonderful Language Arts programme like no other!
Brave Writer-growing confident writers.

All About Spelling* is a brilliant spelling program that is particularly effective for DYSLEXIC children. However, I use this for all my children since it uses a multi-sensory approach making spelling fun and engaging! 100% money-back guarantee for one year!
All About Spelling

All About Reading* is a reading program that gives you all the tools you need to teach your child to read. All the work is done for you, and there are several activities to keep your child engaged. 100% money-back guarantee for one year!
All About Reading
Free Resources to help with Reading and Spelling
Free Ebooks, Activities and Articles
Brilliant reference book
Everything You Need to Ace English Language Arts in One Big Fat Notebook
100s of free worksheets for all subjects.
No fuss, inexpensive way to teach your child how to read*
How to teach your child to read in 100 easy lessons.
100s of free worksheets for all grades.
Great to teach blending and word families.
Carls Corner
Complete series of books, perfect for new readers.*
Bob Books
Great books for early readers
Biff, Chip, Kipper Series
Complete Grammar Program*
First Language Lessons
Make your own free handwriting sheets.
Writing Wizard
Affordable workbooks for English, Maths and Science.
Schofield and Sims
Free E-books for children 3-11 (includes, Biff, Chip and Kipper series)
Oxford Owl Library
Grammar, Spelling and Comprehension worksheets for all grades.
K12 Reader
Free Spelling lists for grades 1-9
Spelling Words Well 
Colour coded magnetic letter tiles; great for all grades. 
Easy way to teach Prefixes
Easy way to teach suffixes

Tonnes of free worksheets and videos for primary level with varying levels of difficulty
Corbett Primary
Math Mammoth can be purchased with US and International currencies/measurements. A great affordable option for drilling concepts.
Math Mammoth
Brilliant learning Math through narrative (Christian refs so often).
Life of Fred
Brilliant reference book
Everything you need to Ace Math in One Big Fat Notebook
For Math, Science and Language Arts
Timetable practice with games and quizzes (Mute Music!)
Timetable Practice
Customizable Times Table Practice Worksheets
Times Table Generator 

Brilliant reference book
Everything You Need to Ace Science in One Big Fat Notebook
Hands-on Science experiments, which younger children love.
Mystery Science
Affordable Workbooks from KS1 to KS2
Schofield and Sims
Science games, projects, and quizzes
Science Kids

A monthly mini “newspaper” filled to the brim with important historical events and intermingled with fun facts and stories that kids will enjoy. Learn tidbits of American and world history just by reading the paper!*
The Yesteryear Gazette 
Brilliant books about famous figures and events. Great reads for adults too!
Who Was Book series
Information, games and activities.
BBC History

Ancient Rome
Ancient Rome Lesson Plans and activities
Mr Donn
10 Dates that are key in Roman History
History Extra
Ancient Rome info and quizzes
DK Find out
More info on Ancient Rome; includes the option play an audio reading of the info.
Free Roman numeral worksheets
Math Salamander
K5 Learning
Brilliant Map and timeline
Time Maps

Middle Ages
Byzantine Empire Word Search
Byzantine Empire Information and Quiz
Vikings – Key Stage 2
Vikings – Info and Quiz
Middle Ages Lesson Plans 
Anglo Saxons – Key Stage 2
Anglo Saxons colouring pages
Vikings and Anglo Saxon Fact Sheet
Alfred the great lesson pack
Bio of Alfred the Great and other rulers
Short story about Charlemagne

Recieve beautiful vintage style monthly letters from around the globe; customised for your family!  A beautiful innovative resource to teach Geography my kids look forward to every month.*
Letters from Afar
Videos, documentaries and overall reference point.
National Geographic
Online Encyclopedia
Brilliant short Youtube videos covering individual countries and flags.
Geography Now
Free Online Geography curriculum- master Geography in seven months!
Charlotte Mason Geography book (great for read alouds)
Elementary Geography

Free touch typing course
Typing Club
Great reference book (including coding)
Everything You Need to Ace Computer Science and Coding in One Big Fat Notebook

Famous artists – quizzes, games and information. (Also has other material including Christian teachings; also check Artwork beforehand to check it is appropriate)
Gardens of Praise


Free Dyslexia Checklist
Symptoms of Dyslexia Screening Checklist
Free E-Book
How to make Spelling easy
Free Dyslexia resources
Activities, games and e-books plus tonnes of support
Brilliant resources from a veteran homeschool mom with dyslexic children.
Homeschooling with dyslexia

For all subjects
Brilliant online videos, clearly explained, for all subjects and ages.
Khan Academy
Worksheets for all subjects – free and subscription options
Parents in Touch
Books from Primary-A Level revision books for all subjects. Great layout.
CGP Books
Lesson plans, reading passages and activities (free and paid)
Scholastic Teachables
Hundreds of worksheets, resource recommendations and games for all subjects and grades. Brilliant website!
Student Handouts

Quizzes on all GCSE subjects including cores aswell as History, RE, and Geography
Education Quizzes
Free Math videos and worksheets for GCSE level
Corbett Maths
Hundreds of worksheets, resource recommendations and games for all subjects and grades. Brilliant website!
Student Handouts

Planning and Organising
Brilliant Online Homeschool Planner (and app) THIS HAS SAVED SO MUCH TIME AND ENERGY!!
Homeschool Panda
Colourful Homeschool Planner for the year
The A+ Homeschool Planner
Beautiful Undated 12 Month Planner
Happy Planner
Free Printable Homeschool Planner in several colours and designs
Tina’s Dynamic Homeschool
Home Management, organisation and schedule printables