This site provides even more ideas for special projects that involve multiple academic areas. They have examples such as "Round the World Trip" and "Solar Car Races." Take these ideas and run with them to make them into something that works for both you and your teaching team.
This site is full of middle school level, cross-curricular unit ideas. It emphasizes projects that broaden the students' understanding of the world, and that are inquiry based. Take some time and look through these ideas!
This is a research article that summarizes the findings of a study on the implementation of an integrated curriculum. As educators, there are a lot of trends that are claimed to help student growth, so it's great to see real research that supports the claims. In the summary, the implementation of integrated curriculums showed an increase in application of skills, faster retrieval of information, greater depth of learning, and more positive attitudes when learning.
This is a detailed guide on designing your own multidisciplinary units. It covers topics such as performance maps, essential questions, allocating responsibilities, instructional sequence, student assessments, and individual lesson plans. This guide will help you to think of everything when developing your unit so that you have guaranteed success from the first attempt.
This article provides a great place to start when beginning cross-curricular teaching. It outlines the requirements necessary for cross-curricular units to be successful, along with the type of collaboration needed as well. It explains that there are three phases of collaboration you need to focus on: aligned, cooperative, and conceptual. This article gives a great informational foundation that you need before you start.