I think this is a winning idea for several reasons! First of all, I’m really intrigued by the idea of flipping the writing instruction so that students are doing more of their writing practice in the classroom where the support is available. I would imagine that this would lead to less student frustration and that students are finding themselves better equipped to tackle the roadblocks that occur during writing. I like the fact that this activity asks students to work collaboratively to create thesis statements and build off of each other’s ideas. Also, I really like the fact that the teacher models editing and thinking out loud. This is a great way to show students what you mean, rather than just telling them. Finally, making this activity fun with music and good-natured competition will most likely make for more engaged students. Love the fact that this idea can be adaptable to other mini writing lessons. Thanks for the great idea!
Once they have mastered the basic concept and structure of the thesis statement, students will benefit from practicing the skill as often as possible, and from plenty of feedback on how they can improve their thesis statements. It can take a long time for the skill to become second nature. In addition to requiring students to include thesis statements in all their compositions, consider using other games and activities for extra practice, such as letting students submit thesis statements to a contest and vote on the winner, working as a class to write a "thesis statement" for a math, science or social studies lesson on the board and letting students write thesis statements about things that interest them.