nikolaevna martsinkevich, maxim kisel, svetlogorsk gymnasium, handsome, charismatic. ivan zamulin, secondary school number three of osipovich, kind, reserved, class leader , chemistry teacher, lyudmila viktorovna mikulich. maria katchenko, nesvizh gymnasium, purposeful, inquisitive, creative, and her class teacher, english teacher, natalya vladimirovna katchenko. ksenia kosten, secondary school number 5 of veleyki believes that what byty. you study for yourself and her class teacher , defectologist olga nikolaevna mikulich. vladislav navitsky , minsk gymnasium no. 5, named after the hero of the meeting on the elbe. his motto is knowledge is power, and i want to be strong. and the math teacher nadezhda valentinovna novitskaya. alina kvyatkovskaya - minsk secondary school no. 54. a beautiful, kind, smart girl. and her class teacher, german teacher inna anatolyevna radiminovich. i have one more person to introduce, this is our scientific expert ekaterina duko. head of the department of methodological support of natural. mathematical education national institute of educat