NEW EAGLE, Pa. (AP) — More than 200 members of a teachers' union in Pennsylvania's Ringgold School District have gone on strike.

The teachers claim they tried to reach a new contract Tuesday, but say school board negotiators weren't prepared to make an offer or even discuss key "sticking points" including salaries and health care costs. In general, the teachers in the lower-income district say they make less than others in the greater Pittsburgh area and that some teachers have to take second jobs because of their low pay.

The sides are next expected to negotiate on Monday.

The district says classes are canceled until further notice.

The last contract expired in July and the sides have been negotiating for about a year.

The district is centered about 20 miles (32.2 kilometers) south of Pittsburgh.