In Australia, STEM-skilled jobs are growing faster than any other sector. Yet, women make up a disproportionately small number of those in STEM education and STEM jobs. Closing gender-based gaps in STEM careers is of global importance. Readers from around the world can enjoy the Girls in STEM Toolkit (GiST) report's contents thanks to its availability under a Creative Commons Attribution (CC BY) 4.0 International licence. Relying on five years of data on STEM education specific to women and girls, the report highlights ways educators can address inequities. Each of the report's seven ideas, which range from creating engaging and interactive classrooms to ensuring access to diverse role models, is followed by a list of "classroom strategies" to ease implementation. The report was authored by Rebecca Vivian (University of Adelaide), Leanne Robertson (Education Services Australia), and Martin Richards (Education Services Australia) and guided by Melanie Isaacs's work in The GiST's Seven principles for a gender-inclusive learning environment. It was made possible with financial support from Education Services Australia (in collaboration with The University of Adelaide).