I can't believe I haven't shared this website with you before!
Have FUN teaching is an incredible website offering free downloads for nearly everything you could need in your classroom!
My favorites are the First Grade Reading Comprehension stories and the Math Worksheets. I used both of these extensively in my classroom last year, even recommending the site to the first grade teachers in my district as a resource for instructional materials.
http://www.havefunteaching.com/ also has flashcards, coloring pages, songs, and teacher tools (such as desk name plates) available for download.
It doesn't get better than FREE and the FREE doesn't get better than http://www.havefunteaching.com/.
Now get over there and check them out! I promise you'll find something you can use!