Read Works is the first one I'll share. It has a database of reading articles that you can search by topic, by genre, by reading level, and by comprehension skill. I love that I can see the readability level so that I select material that hits my students' needs AND that it reinforces science and social studies concepts. Comprehension questions are included with each passage, so teachers have the option to use/not use them.
[here]. Reading A-Z offers materials for all levels K-6 as well as poetry, reader's theater, close reading articles, fluency checks, word study and alphabet lessons, and lots of manipulative printables. I love the projectable version.
[This post] will help you learn a bit more about the mentor text lessons it includes. I love that there is bibliography that I can search through in a quick glance for my favorite titles.
The last website is fairly new to me, and it's all about the news! Newsela offers current event articles and questions to teachers that are geared to student interest and to student needs. Some topics tie in well with content areas, and like Read Works, Newsela is leveled to assist the teacher in appropriate selection.
For each website mentioned, just click the image to check it out. I hope these time-saving sites will provide you with lots of great planning ideas. Have a great weekend!