Set up different workstations in the classroom so students may pursue their interests. For example, in an English class, you might have stations for writing a poem, drawing a picture of a character based on a written description and watching a movie clip related to a novel. In a science classroom set up different lab stations. One station might be a dissection of a plant, while another involves an analysis of fingerprints.
Allow students to be in charge of leading the lessons on certain days. Assign them to small groups or allow a particularly ambitious group of learners their own personal topics. Work with the student to prepare a lesson on how to use commas, why fractions are important in every day life or the causes and effects of the American revolution. Introduce or conclude the lesson with some information and background of your own about the topic.
Consider proposing your school create some outdoor classrooms or create your own. Bring a large blanket for the children to sit on or arrange some picnic tables, so students have a comfortable surface to work on. Offer a science lesson on leaves or rocks or just present your lectures and allow for educational discussions in this different kind of learning space.
Assign your writing, English or elementary school classroom a writing assignment that makes them think outside the traditional topics. Ask them a time a funny incident occurred in their lives, what their most memorable moment was from a certain grade or what rides they would put in their own amusement park. You might want to leave the assignment completely open and allow them to write about any topic of their choosing.