American Modeling Teachers Association. Teachers Transforming STEM education through Modeling Instruction. Tweets by @eposthuma Transforming STEM education through Modeling Instruction. AMTA is a professional organization of teachers, by teachers and for teachers who utilize Modeling Instruction in their Science, Technology, Engineering and Mathematics (STEM) teaching practice. Our mission is to provide professional development for teachers in the Modeling Method of Instruction, to provide resources that support the use of Modeling Instruction in physics, chemistry, biology, mathematics and middle school science classrooms, and to support and enable collaboration among Modelers. AMTA strives to foster brilliant teaching and deep learning.