Well.......I (sort of) support DAT's premise, to the extent that all students are not equal, and the mark of a good teacher is recognition of, and management of that fact. Since education is subjective, metrics become worse than useless, they actually work against the premise that all students are capable of being educated......just in differing ways and to different accomplishment levels.......
That said, I think that there needs to be some basic standards, such as reading comprehension, basic math skills, and proper use of language. I believe that all K-12 students (that are not mentally disabled) should be able to manage reading at a tenth grade level, speak and write correct basic English, and handle basic mathematics (addition, subtraction, multiplication, division) in a practical manner........everything else is enrichment........some students will accomplish these objectives by the fifth grade (the vast majority by at least the seventh) .......others may take until the twelfth......but those are the requirements.
Starting from this premise, curricula becomes divided into two fundamental paths, the first being the continuation of basics for those requiring it, and the second, enrichment for those that have attained the basic skill levels early. The two pathways can be divided into differing classroom/teacher groups (preferred), or integrated into one "grade" as dictated by manpower and building resources available.
Teachers are then evaluated on a very simple metric.......
How much improvement has their least advanced student demonstrated.......
How much enrichment has their most advanced student accomplished........
Finally, there should be no "tenure"......employees change over time, and good ones can go bad for a variety of reasons. Teachers are employees.......simple as that, and if they go bad, develop attitude problems, or become complacent, they need to be fired......no discussion, no appeals, no union involvement.....they are gone. Further, there should be no 2 - 3 month summer vacation for teachers.....during the summer classroom break, they should be required to report every work day, and spend that time preparing a unique and customized lesson plan for every individual incoming student for the fall term, in conference with each student's prior year teacher. Once this is accomplished, the balance of their time can be spent developing integration for coursework for the class at large.
Everything else is "window dressing".......
doc