Thank you for writing us regarding online tests for reading comprehension. In our LearningExpressLibrary, there are 4th grade reading practices, as well as 6th, 7th, and 8th grade reading diagnositc tests. Go to our Databases page, and click on LearningExpressLibrary to start. When you access from home, you need to log in with your Canton Public Library card number. Hope you'll find this a useful tool for your child.