Student-centered learning methods make lessons interesting, help students to make judgments of substance and foundations, support students in understanding the contents to be able to apply them in real life. Among the methods that activate teaching-learning are also those through which students work productively with each other, develop collaboration skills and mutual help. They can have an extraordinary impact on students due to their names, playful character and offer learning alternatives with "plug" for children. In order to develop critical thinking in students, we must use, above all, some active-participative, creative strategies. These should not be separated from the traditional ones, they mark a higher level in the spiral of modernization of didactic strategies.