The toolkit, is designed for flexible use in various settings, such as classrooms, after-school programs, and summer camps. The toolkit includes an introduction, glossary, and background research related to factors effecting STEM participation, specifically self-efficacy, race, and gender. Also included in the toolkit are four activities each designed to introduce STEM concepts while fostering a growth mindset. The first two activities include detailed lesson plans and handouts so teachers can feel confident leading the hands-on STEM activities with students.