School models have been slow to evolve, however, expectations of students in terms of schoolwork and homework have increased year over year. These increased demands require a high level of Executive Functioning (EF). However, a disconnect between the demands of schools and children's developing EF system have led to increased incidences of academic-related stress in adolescents. Due to the impact EF deficits have on student achievement and affect and the key role teachers play in assessing and addressing EF deficits, it is critical to understand teachers' knowledge and beliefs about EFs and how this informs their instructional strategies.This study, through a quantitative design, explored New Jersey Association of Independent School member schoolteachers' beliefs and knowledge of Executive Function (EF), their knowledge of indicators of EF deficits, and the strategies they use to support students with EF deficits and whether there is correlation between these variables and their experience and training. Due primarily to small sample size and convenience sampling, no correlations, positive or negative, were found between teachers' experience and training and their knowledge/beliefs/practices about EF and the strategies they would use to support students with EF deficits. The study did, however, find a negative correlation between teachers' experience and their flexibility in terms of the instructional practices they would use to support students with EFs. This indicates that teachers earlier in their careers are more likely to differentiate their instructions to support students with diverse learning needs. This study includes recommendations for future research and implications for practice in this critical area.