Nine years ago we started to develop a Collection of fully Solved Problems. The collection is specially designed to encourage students in active approach to problem solving, e.g. to solve at least some parts of a problem independently.
Four years ago the development of a "sibling" collection - the Collection of Experiments in Physics began. Nowadays the database contains about 750 fully solved problems in physics and 350 problems in mathematics in Czech, more than one hundred problems in Polish and more than 120 problems in English.
Besides this there are about 70 experiments described in very detail in the collection of experiments. The new approach is adding links among problems and corresponding experiments to enable teachers to use them together.