A hands-on approach to introduce the chemical elements and the atomic structure to elementary/middle school students is described. The proposed classroom activity presents Bohr models of atoms using common and inexpensive materials, such as nested plastic balls, colored modeling clay, and small-sized pasta (or small plastic beads).

Evidence evaluation is a crucial process in many human activities, spanning from medical diagnosis to impression formation. The present experiments investigated which, if any, normative model best conforms to people's intuition about the value of the obtained evidence. Psychologists, epistemologists, and philosophers of science have proposed…

This paper presents some of the overall frameworks and models for language learning that were used under Avalon (Access to Virtual and Action Learning live ONline), an EU co-funded project aimed at developing language-learning scenarios in virtual worlds. The introduction and background summarize some of the theories that constitute the starting…