Project CLEA (Contemporary Laboratory Experiences in Astronomy) develops laboratory exercises that illustrate modern astronomical techniques using digital data and color images. They are suitable for high- school and college classes at all levels. Project CLEA puts to disposition of the didactic instruments dedicates to the radio astronomy. Two are the specific programs in this sense: Radio astronomy of pulsars and The rotation of Mercury by Doppler effect. For everyone they will come described to the peculiarities, the didactic fine and the procedures for the obtaining of meaningful measures. The described procedures do not differ minimally from the usual calculations carry out to you from astronomers. The didactic aspect is interlaced with the peculiarities of the official research.