If you want to practice only irregular tenses you can click on the checkbox and mark this feature before starting the verb exercises.
Lea, Bern, Switzerland: 'Vocabulix is a time saver. We use it at our school with our own lessons. Each week a different student is volunteering (some are also forced to) to insert our lessons to the system and then we share it.'

Central Valley Spanish School - classes designed to provide the maximum flexibility for students at all levels: Methodology is based on total immersion in the Spanish language, personalized attention for each student, offers courses for special interests, optional afternoon activities available.