In addition, I have a suggestion: Since the DSTP (Delaware State Testing Program, which begins this week, by the way) only tests math, reading and writing (the social studies and science tests later this year do not count towards grade advancement/promotion), why not pay math and english teachers more right off the bat? It is they who have all the pressure of preparing students to take these tests, after all. It is they who have to deal with the repercussions of the results, positive or negative. As it is, it's already tough to attract good math teachers because they can make more in industry. With the pressure of the DSTP, it's even worse.
Which leads me to another idea: Why not set pay scales based on the relative market for the subject the teacher teaches? For example, again, math and science teachers are typically the most difficult to attract/find. Ditto for foreign language teachers (yay!). Set those pay scales higher. Social studies and phys. ed. usually have a glut of potential hires. Set those scales lower.
With these two brainstorms, math teachers would be making the most as the market for those teachers has the greatest scarcity, and they have the added "pressure" of the DSTP. English, foreign language and science teachers would rank somewhere thereafter, followed by social studies and phys. ed. Other subjects' markets would determine where they would fall on the scale.