Here are some great resources that have free reading worksheets, games, and activities. Please feel free to use them for extra practice during the school year or summer breaks.
This is a great website that has worksheets for practicing reading comprehension (K-12), analogies, sentence completion, writing, grammar, and vocabulary. The reading comprehension worksheets are divided by category such as technical reading, information reading, etc. It is very comprehensive and easy to navigate and best of all its free.
This site is geared more for elementary school students but has a variety of free phonics and reading comprehension.
This site is also geared for elementary school students but has games, media, activities, reading worksheets as well as math worksheets for K-5th.
This is a great site for reading comprehension worksheets for grades 3 and up. There is a large variety, organized by topic and grade level in downloadable and printable pdf format.