The purpose of the study reported was to determine the best ways to manage interest centers in the elementary classroom. The study considered six techniques of assigning students to interest centers--teacher assignment, in which children were asked by their teacher to work at the center on a certain day; daily sign-up, in which children were allowed to choose at the beginning of the day whether they would like to visit the center; weekly sign-up, in which students picked the day they would like to visit the center; partner sign-up, in which the weekly sign-up format was followed with the additional consideration that students signed up with a friend; non-sign-up center, in which children were given six days in which to visit the center but no sign-ups were held; and the small-group center, in which three or four students were assigned to the center to complete a task as a group. The group studied was made up of 17 students, nine in grade 4 and eight in grade 3. The most popular assignment methods were partner sign-up and group center. (Author/IRT)