This book by Roberts and Kellough is an excellent resource. The initial chapters give helpful background information regarding the development of interdisciplinary thematic units (ITU's). The remaining chapters give you a step by step guide for developing your unit. The book takes you from brainstorming to developing the individual lessons to unit culmination. The final chapter of the book provide excellent examples of ITU's involving a variety of curriculum areas. This book would be an excellent resource for any educator or educator to be. This book allowed me to complete my first indepth ITU with relatively few problems.