This plan would most likely be used by a new teacher or long-term subject subcontractor. This process allows the teacher to take a lesson plan prepared by another teacher and use it to teach a topic to the class. While this may seem like an easy route to take, there are some drawbacks to using this method. “Even when teachers are working with prepared materials, they must still clarify what they want students to learn, anticipate how students are likely to respond, and adapt teaching suggestions to their own situation” (Dorph and Feiman -Nemser, 1997). This means the teacher still needs to work on the lesson to ensure it can be taught to their classes. As with the teacher-prepared method, commercially purchased lesson plans are also available. This plan is one in which the teacher uses a lesson or tool created by an outside company and not by a teacher. This allows the teacher to use information that could have more concrete examples for students to understand. Just like using other sources that are not controlled by the teacher, there are also disadvantages to using this process. “The developers of most of today's commercial programs state that their programs are 'research-based,' but they usually mean that several educational activities contained in the programs have been shown to be effective” (James-Burdumy & Mansfield, 2009). This means that information in lessons or materials may not be accurate and creator bias may be included in