One of the best sites I have seen for helping set up Writer's Workshop. She has amazing ideas for genre units (and celebrations)! Also has great ideas for reading workshops and teaching math and other units.
Science for Kids: a wide range of fun science lesson plans featuring educational activities for kids, ideas for teachers, free online resources and more to help bring interactive, hands on science to your home or classroom.
This could be adapted to suit my class! (via Team V’s First Grade Fun: “I’m Done” Cups) Students pick a stick from the “I’m Done” cup and work on an activity when they are finished with their work. Teachers can range the activities depending on the grade.