Here are some places where you can find free reading worksheets for kid - to be printed out or read online. The following is a compilation of these free resources for your use.
Worksheets for Younger Kids
Reading Target provides free phonics worksheets and reading tests, covering phonemic awareness, alphabetics and sight words for both parents and teachers alike.
Huge collection of professionally produced free reading worksheets from Learning Page for you to download and print. You can start by checking through their samples or become their member to download all they have to offer. The membership is FREE!
abcteach.com has reading comprehensions for fictional and informational reading practice. Useful for teaching test-taking skills. Only some of the worksheets are free while the rest can be access with paid membership. This site has reading worksheets for kids ranging from K-2 to Middle/High School.
Worksheets for Older Kids
rhlschool.com Here you can find free reading comprehension worksheets for teachers and parents to copy for their kids. They include original stories, poems, essays, and articles. They are most appropriate for upper elementary through middle school years.
teach-nology.com offers just under one hundred Reading Comprehension worksheets, serving a variety of needs. The worksheets are well classified into subject area and level of difficulties for easy reference. Caters for younger kids as well.