Gustav is 10 years old and is studying in fifth grade. As he started school, he developed greater interest for mathematics and he liked solving problems in Khan Academy. At eight years old he decided to start making math videos (his channel: www.youtube.com/channel/UCj9zq3EM-SQa1u21fT_G0zg) for his peers which, in addition to what is taught in school, would introduce alternative methods for solving math problems. In addition to multiplication, division, compounding and subtraction, Gustav has also recorded clips on his favourite subjects, like supernovas, electricity and phobias, with the most recent video being a peek into the periodic table.