I found another free reading and language arts curriculum I want to share: CKLA Skills series. This is a full language arts curriculum, but I've mainly used the reader (which are included from KG Level 4 up, and are decodable and engaging and have great illustrations . I really adore the free printable readers and have been using them to supplement the readers from the other curriculum I use with the kids I tutor in reading. New skills are added gradually and in the earlier grades are marked in the text. While I haven't used the rest of the curriculum, it looks solid (at least at the Kindergarten level, which is what I've mainly looked through).
But man, I wish they made these easier to find on their site. They aren't all listed in one place (at least that I could see). In stead you have to use their search function to find them, and they don't always come up in order. So, I thought I would link to these resources in order to make it easier for you all to find.
The curriculum covers grade KG - 3. They have other curriculum on their site that goes further which you can also find here. Also, this site has interactive online versions of 3-4 of the stories for these levels.
CKLA Language Arts Skills Series
Kindergarten Skills
Note: Readers are not offered until KG Unit 4. The names of the readers are included next to the unit link.
KG Ancillary Materials (Used in various levels)
KG Unit 1
KG Unit 2
KG Unit 3
KG Unit 4 - Pet Fun
KG Unit 5 - Ox and Man
KG Unit 6 - Kit
KG Unit 7 - Seth
KG Unit 8 - Sam
KG Unit 9 - Zack and Ann
KG Unit 10 - Scott
1st Grade Skills
1st Grade Ancillary Materials
1st Grade Unit 1 - Snap Shots
1st Grade Unit 2 - Gran
1st Grade Unit 3 - Fables
1st Grade Unit 4 - The Green Fern Zoo
1st Grade Unit 5 - Kate's Book
1st Grade Unit 6 - Grace
1st Grade Unit 7 - Kay and Martez
2nd Grade Skills
2nd Grade Ancillary Material
2nd Grade Unit 1 - The Cat Bandit
2nd Grade Unit 2 - Bedtime Tales
2nd Grade Unit 3 - Kids Excel
2nd Grade Unit 4 - The Job Hunt
2nd Grade Unit 5 - Sir Gus (Chapter Book)
2nd Grade Unit 6 - The War of 1812
3rd Grade Skills
3rd Grade Ancillary Material
3rd Grade Unit 1 - Classic Tales
3rd Grade Unit 2 - Rattenborough's Guide to Animals
3rd Grade Unit 3 - How Does Your Body Work
3rd Grade Unit 4 - Stories of Ancient Rome
3rd Grade Unit 5 - Adventures in Light and Sound
3rd Grade Unit 6 - Gods, Giants and Dwarves
3rd Grade Unit 7 - What's in Our Universe
3rd Grade Unit 8 - Native American Stories
3rd Grade Unit 9 - The Age of Exploration
3rd Grade Unit 10 - Living in Colonial America
3rd Grade Unit 11 - Intro to Ecology
