Associates of Frederick Sanger: John Walker, Nobel Laureate 1997. American Chemical Society National Meeting, Atlanta, Georgia.

Associates of Frederick Sanger: Rodney Porter, Nobel Laureate 1972. American Chemical Society National Meeting, Anaheim, California.

Frederick Sanger: The early years. American Chemical Society National Meeting, New Orleans, Louisiana.

Student Demonstration of Mastery by Oral Performance. National Science Teachers Association Meeting, Portland, Oregon.

Frederick Sanger: The DNA years. American Chemical Society National Meeting, Orlando, Florida.

Science in Fiction, Peking University, Beijing, China.

Frederick Sanger: The ribonucleic acid years. American Chemical Society National Meeting, San Diego, California.

2000

Frederick Sanger: The protein years. American Chemical Society National Meeting, San Francisco, California.

Writing experiments for the sophomore organic laboratory. American Chemical Society National Meeting, Anaheim, California.

Service learning and natural sciences. [Invited] Service Learning Workshop, Ouachita Baptist University, Arkadelphia.

 1998

Hands-on activities in physical science grades K-4. [Invited] Arkansas Leadership Conference in Science and Mathematics, University of Central Arkansas, Conway.

 1997

Hands-on activities in physical science for elementary science teachers. National Science Teachers Association Annual Meeting, New Orleans, Louisiana.

Activities integrating mathematics and science for grades K-4. National Council of Teachers of Mathematics, Southern Regional Meeting, Houston, Texas.

Hands-on activities in physical science for grades K-4. [Invited] Arkansas Leadership Conference in Science and Mathematics, University of Central Arkansas, Conway.

Ethics across the curriculum: the results of a four-year study of integrating ethics in technical courses. [Invited] Association of Practical & Professional Ethics National Meeting, Washington, D.C.

 1994

Hands-on activities in physical science for grades K-4. [Invited] Arkansas Leadership Conference in Science and Mathematics, University of Central Arkansas, Conway.

An environmental analysis program with a major in chemistry and a minor in biology. American Chemical Society National Meeting, San Diego, California.

 1993

Hands-on science activities for grades K-4. [Invited] Arkansas Leadership Conference in Science and Mathematics, University of Central Arkansas, Conway.

Hands-on activities in physical science for elementary science teachers. National Science Teachers Association Annual Meeting, Kansas City, Missouri.

 1992

Transcription termination region of galactose operon from E.coli. [Invited] Kazakh State University, Alma-Ata, Kazakhstan.

 1991

Transcription termination region of galactose operon from E. coli. Keystone Symposium on Molecular Biology: Regulation of Transcription Elongation and Termination, Keystone, Colorado.

 1989

Teaching elementary science: a model for effective in-service training. National Science Teachers Association Annual Meeting, Seattle, Washington.

 1988

Writing a science column for the local newspaper. National Science Teachers Association Regional Meeting, Little Rock, Arkansas.

 1987

Elementary science: the training of grade-level resource teachers. [Invited] Education for Economic Security Act National Meeting of U.S. Department of Education, Exemplary Programs Sections, Washington, D.C.

Science experiments which any kindergarten teacher can do. [Invited] Kindergarten Division, Arkansas Education Association Annual Meeting, Little Rock.

Teaching basic skills in science to upper elementary students. [Invited] Arkansas Science Teachers Association Annual Meeting, Little Rock.

Common Science: a newspaper column for small towns. Arkansas Academy of Sciences, Annual Meeting, North Little Rock.

 1986

Implementing the basic skills in science for kindergarten. [Invited] Kindergarten Division, Arkansas Education Association Annual Meeting, Little Rock.

Teaching basic skills in science to primary students. [Invited] Primary Division, Arkansas Education Association Annual Meeting, Little Rock.

Elementary school science: training teachers to teach teachers. [Invited] Arkansas Association for Supervision and Curriculum Development Conference on Assessment and Instruction, Hot Springs.

Teaching elementary science: a model for effective in-service training. Arkansas Academy of Sciences Annual Meeting, Arkadelphia.

 1984

In search of the transcription termination region of the galactose operon from Escherichia coli. Arkansas Academy of Sciences Annual Meeting, Fayetteville.

 1979