The aims of teaching have evolved along with the society in which we live, from a teaching based in memory to a one that teaches to reason, in order to adapt to the accelerated rate of change imposed by the application of scientific discoveries in our society. We have a society in continuous learning, which requires the ability to reason in order…

This activity allows students to visualize how to obtain different stoichiometries with various techniques in a single experiment. The involvement of three phases adds to the student's interest. Instructional materials are provided to facilitate the experimental procedures, interpretation of results, and error analysis. The reaction of Li from a…

Introduction: In the Baccalaureate, the exact and experimental science subjects demand the development of scientific competence, which in turn requires mastery of theoretical knowledge and practical knowledge, but also motivation and sustained effort for greater involvement and academic performance. Hence the relevance of knowing the motivational…

In its program of studies for preschool level, the Secretary of Public Education of Mexico promoted development of four standards of science: Scientific knowledge, applications of scientific knowledge and technology, skills associated to science, and attitudes associated to science. However, to develop this skills and reach out the standards there…

We selected diabetes mellitus for this laboratory exercise to provide students with an explicit model for scientific research concerning the association between the R230C polymorphism and susceptibility to type 2 diabetes mellitus, which is highly prevalent in the Mexican population. We used a collaborative project-based learning to engage…

An electronic circuit for controlling "RLC" experiments is shown. This arrangement does not employ a function generator, which makes it more suitable when a wide range of "R," "L" and "C" values is required and a relatively high current is involved. This circuit can be used for driven and undriven DC…

Describes the recent history, chemistry, and educational uses of the Orange Juice Clock demonstration in which a galvanic cell is made from the combination of a magnesium strip, a copper strip, and juice in a beaker. Discusses the chemistry basics, extensions for more advanced students, questions for student/teacher workshop participants, and…