1. Poor (quality) education may stem from lack of government support/funding and regulations as well as lack of resources (financial, physical, human).. . 2. For legal requirements see the Constitution, 1997 Amendments to the Individuals With Disabilities Education Act (IDEA) or 1975 Education for All Handicapped Children Act (EAHCA). . . 3. Due process as regards grievance or administrative cases are pretty similar in any industry, the basic requirement is as follows: the person "charged" should be notified or receive a warning pertaining to the charges against him/her and should be provided the opportunity to air his/her concerns in an appropriate setting/hearing.. . 4. As regards professionalization of teachers teaching, are you inquiring about the standards for entry into the profession? That would depend on the country and the institution of learning.. . 5. As regards principles and teachers improvement, I'm not very clear on the question but I would think that this is dependent on the country and institution of learning. I work in the educational sector and we have faculty development programs aimed at helping our teachers improve themselves in relation to the courses they teach and for career advancement.. . 6. Accreditation is necessary for an educational institution to be permitted and recognized to teach certain things. The benefits (to name a few) are recognition, permission to teach, ability to acquire quality faculty (you can be choosy), SCU (school/college/university) may issue certain documents without passing through a higher body (ergo less red tape and paper work), receive perks such as subsidies and financial incentives. The legal basis I suppose is dependent on the country.. . 7. Quality Education is a vague concept. What is considered quality for one may be considered mal-education for another. It's not necessarily true that private schools receive more quality education than public schools. Quality education depends on the criteria set by the country/educational institution, but basically it should be providing correct information through appropriate mediums.