See Social Equity to view advertising package. For filling HR type positions. American Association of Physics Teachers . There are two options here. A monthly called The Physics Teacher and another called The Announcer.
Prices vary depending on the size of the ad.
AAPT Advertising Dept., One Physics Ellipse, College Park, MD 20740-3845. Phone 301.209.3322, fax 301.209.0845. There are several newspapers that will post your job online as well as in hard copy. Usually if you post in hard copy, they automatically include it on their website, but it never hurts to ask. Independent New Pittsburgh Courier Post-Gazette 2.