Science, technology, engineering and math (STEM) skills have become essential for today’s youth. STEM-literate individuals are a necessity to fill the ever-growing STEM employment pipeline. Employers are expecting applicants with STEM skills. 4-H programs across the nation have recognized the importance of educating STEM-minded youth. As STEM programs become more prevalent within 4-H, it is essential to address challenges Extension educators and 4-H volunteers face when teaching STEM curriculum. In this study the Delphi technique was utilized to collect the opinions of a geographically dispersed group of 4-H Extension educators and volunteers. Each group served on a separate panel and were asked the question, “What challenges do you face when teaching STEM curriculum?” After three rounds of study, both the educator and volunteer panels identified 2 challenges faced when teaching STEM curriculum. Through identification of these challenges, Oklahoma state 4-H staff can better address the professional development needs of educators and volunteers within the organization, and support the desired scientific literacy outcomes of 4-H youth.