Barbara J. Bestgen

Teaching Kids to Estimate.

Robert E. Reys, Barbara J. Bestgen, 1982 .

Films in the Mathematics Classroom

Robert E. Reys, Barbara J. Bestgen, 1982 .

PROCESSES USED BY GOOD COMPUTATIONAL ESTIMATORS

Robert E. Reys, Barbara J. Bestgen, James F. Rybolt, 1982 .

Effectiveness of Systematic Instruction on Attitudes and Computational Estimation Skills of Preservice Elementary Teachers.

Robert E. Reys, Barbara J. Bestgen, James F. Rybolt, 1980 .

Making and Interpreting Graphs and Tables: Results and Implications from National Assessment.

Barbara J. Bestgen, 1980 .

Teaching and Assessing Computational Estimation Skills

Robert E. Reys, Barbara J. Bestgen, 1981, The Elementary School Journal.