On Wednesday 17th May, Geelong High School hosted three mathematicians from The University of Melbourne School of Mathematics and Statistics as part of the Micro Mathematicians incursion. Thirty-nine of our brightest mathematics students across Years 8, 9 & 10 participated in the incursion facilitated by Cindy, Dom, and Susan. The students explored various patterns which at first were seemingly unrelated but upon further inspection were actually BIJECTIONS. A bijection is a function or a rule which pairs elements in sets in a one-to-one function. Students used a variety of items to explore these one-to-one relationships, such as Lego, strips of coloured paper, coordinate graphs, and binary code. The inquiry nature of the incursion required students to collaborate with others as they created and analysed patterns, and students posed many questions about the relationships between seemingly unrelated sets. Students had the opportunity to engage with the mathematicians from The University of Melbourne and demonstrated many of the Geelong High School values during the event. Well done Micro Mathematicians! Ms. Chapman