It is important for Rio Salado College to approve your classroom site for this requirement. If approved, you may use your classroom to fulfill 2/3 of the field experience hours required. However, observation of a certified teacher in his/her classroom is still required.
All educator prep students need to complete the field experience. People with an intern certificate can mentor students and teach some lessons in their own classroom. However, they must do the observation portion of the field experience in another certified teacher's classroom.
Yes, if you have completed all other requirements for student teaching and have the approval and cooperation of your administration, you can be assigned to your own classroom for student teaching. In this case the college supervisor plays a more active role in monitoring your progress. (This option is not retroactive—you must be enrolled in the student teaching lab and assigned a college supervisor for the nine-week placement to be valid.)