I come from teaching 3rd grade for the last 14 years. After having the first few weeks of teaching 1st grade under my belt, I have a different appreciation for what "literacy" means at this age. They are bursting with new knowledge and accomplishments every day! When I think about integrating literacy into a science or social studies lesson, pictures and other graphic representations are a must. Many students at this stage of the school year are unable to read (and understand) text independently. Science and social studies lessons are whole-group, and I use my Promethean Board to project scanned images of text to make the lesson more accessible to my students. Students at this age love to draw pictures to show their understanding. Fortunately, there is a lot of really great technology out there that can let students use clip art and other graphics to show their understanding. Programs like Kidspiration and KidPix have browsable graphics collections that allow students to choose just the right image to show their understanding. It is also very easy for them to add text to these images, so the teacher can either require a word, phrase, or multiple sentences to go with the picture.
science activity using Kidspiration
social studies activity using KidPix
I love using these types of technologies because of their versatility in differentiating for your different types of learners.