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In most chemistry courses today, students are introduced to atoms, molecules, ions, and electrons early in the course, and have to accept the teacher's word that these exist. A better method is to teach chemistry progressively, starting with observations at a macroscopic level, interpreting these at an atomic and molecular level, and then at an electronic and nuclear level. A modern way of doing this is described. [Chem. Educ. Res. Pract. Eur.: 2002, 3, 215-228]doi:10.1039/b2rp90017c fatcat:dfvy7tigd5ab3kee5hcsgar4d4