From July 31 to August 4 there was a workshop for teachers of all age groups on M. Montessori's technique on the topic "Intellectual development of children 3-6 years by means of Montessori materials and presentations of math area". The seminar was held in a favorable atmosphere, and the diversity of resources and ease of their use aroused interest among listeners. Teachers received the necessary recommendations and answers to questions from Ph.D., professor, Montessori teacher AMI Mogilev A.V. At the end of every day of the seminar, teachers were given practical work.