Brain teasers are puzzles that challenge your thinking and problem-solving skills. Solving brain teasers helps improve memory ...

Students in Melissa Williams' kindergarten class at the Westminster School in Atlanta, Georgia, practice connecting quantities to written numbers — a key part of number sense. Credit: Holly Korbey for ...

Missing persons infographic. Graphic courtesy of Lost In Buckeye. This one of several articles in a series about Daniel Robinson and missing persons in U.S. To learn more, read the Publisher’s Note.

Oklahoma has the largest percentage of missing people in America, with Louisiana and Arkansas also above average, the latest federal statistics show. The data also points to wide regional variation, ...