Besides teaching earth science to ninth graders and advanced chemistry to twelfth graders, Manning serves as the president of
the National Earth Science Teachers Association, a group of about 1,000 teachers in the US.
The National Center for Science Education (NCSE) has reported that the Tennessee legislation also is opposed by the Tennessee Science Teachers Association, the National Association of Biology Teachers, the National Association of Geoscience Teachers, and
the National Earth Science Teachers Association, among others.
Under the certification requirements proposed by the
National Science Teachers Association, an elementary - school teacher would have to show a minimum of 12 semester - hours of laboratory or field - oriented science, including courses in each of these areas: biology, physical science (physics and chemistry), and earth s
Science Teachers Association, an elementary - school
teacher would have to show a minimum of 12 semester - hours of laboratory or field - oriented
science, including courses in each of these areas: biology, physical science (physics and chemistry), and earth s
science, including courses in each of these areas: biology, physical
science (physics and chemistry), and earth s
science (physics and chemistry), and
earth sciencescience.