Students need their teachers full-time in their classrooms as much as possible. Continuity and stability are vital to a student's education. This is more critical for special education students.
Subjects like Math and Reading need consistent learning so the material can be learned and retained. Most importantly, the full-time teacher understands his/her students the best and can supply situational learning instead of a substitute who monitor's a study/work lesson. Continuity learning is most critical for elementary and Middle School students. Unfortunately, many students are being taught from substitutes and student teachers who are not proficient in the critical subjects of reading, math and science.
I have blogged before about my substitute teacher friends who can work full time if they want because of the need to fill in for the regular teachers who are off doing testing or conferences. The other major problem is the shortage of teachers and the rapid rate of those leaving the profession. Sadly, this is not from retirement but from frustrated teachers who had no idea what the real job is before getting a degree,
