K12 Reader is more like a spelling and reading curriculum for grades 1-5. There are tons of worksheets for spelling and reading comprehension in here like the Dolch words worksheets and activities, handwriting practice worksheets etc. categorized by grade level. There are also some grammar worksheets. You can also find instructions on a number of topics such as phoneme awareness, reading fluency etc. The site also offers many games and activities to enhance the reading and spelling skills of children. If you like to use curriculums in your home education and are looking for a reading and spelling one, then before spending a good chunk of money you can give this site a try.