App with extra activities for all units, for supplementary practice outside the classroom in game form.Access is made using the code provided in the printed materialThe student will do 6 activities for each of the 8 units of the material, and the 6th activity is a quizz with questions working all the contents of the unit.As an element of gamification the student receives a number of stars according to their performance in the activities.Block - student only moves on to the next unit / phase if they conquer 3 out of 5 starsTrophy - at the end of the book