"Conservative" K-12 education would have some of the following characterists:
Subjects would be taught (and tested) quantitatively. You are there to learn facts and information, how to make calculations, how to think logically and to draw defensible conclusions from known facts, using deductive or inductive reasoning. In the earlier grades the focus would be purely on imparting information and knowledge, moving up through the grades, logic and reasoning would be increasingly required.
Grades would be based on whether you have mastered the materials. Period. Whether your grade makes you feel good or inadequate would be irrelevant. Passing from one grade to the next would be done without compromise. If you don't know the material, you remain in the lower grade, or are transferred to a non-academic program where you will learn useful skills for life and employment.
Students would be grouped according to demonstrated ability level, and challenged as much as possible. The grading in a typical class would approximate a "bell curve," with just as many failing as get "A's." Teachers whose grades were consistently skewed, one way or another, would be challenged to justify the deviation.
If one gender or ethnic group tended to be over or under-represented in a given class or for a certain honor or criticism, tough shit. Unless the grade or placement or award or punishment were demonstrated to be unjustified, it would stand.
History would be taught from an "American" perspective, with due recognition of contemporary reality. No one would go into fits of apoplexy upon learning that Thomas Jefferson owned slaves, nor would his tremendous historical accomplishments be questioned because some so-called "African Americans" claim to be his descendants.
Teachers would be evaluated according to their academic results, and the criteria for measuring those results would be negotiated jointly by teachers and the Administration. Teachers who produced persistently poor results (relative to reasonable expectations) would be terminated, with no apologies. Thus the teachers who remain for a period of years would be paid appropriately as professionals.
Dress codes would be in place to ensure that all students are clean, neat, respectful, and in the case of girls, MODESTLY dressed. There would be uniform dress codes across the entire state, and they would be strictly enforced, with assistance given to students who lack the resources to buy acceptable clothing. (I would suggest that appropriate clothing be made available at in-school stores or on delivery trucks, with payment according to ability to pay).
Disruptive behavior in the classroom would not be tolerated. All suspensions would be served in-school, under the supervison of the football coaching staff.
Mandatory "sex education" would be limited to High School biology class. Sex education would be available on an "opt-in" basis, after regular school hours, for parents who wish their children to have it.