Some ways to practice and develop BICS could be by setting up situations in the classroom in which communicating in BICS is necessary. For example, younger students should have centers set up in the classroom which promote oral communication such as a home center or centers in which partnered work is necessary and children can complete tasks of their liking. They are more motivated to learn when they have the power of choice. Having centers with room for a few children at a time like blocks or water play can help encourage communication here.
You can set up games or vignettes for ESL or other language learners in which practicing incorporating BICS is part of the fun. You can set up a restaurant scene with menus students have made or ones you bring in from restaurants and have them practice ordering food. A grocery store can be set up by bringing in empty food boxes and a cash register for students to practice holding conversations about numbers, money and food. Finally you can play a game where students earn points by including phrases or questions you have chosen in advance into their conversations. They can also get bonus points when they are ‘caught’ using this language during their school day.