Tim Brzezinski is a full time middle and high school mathematics teacher at the Engineering and Science University Magnet School (New Haven, CT) and a part time independent mathematics education consultant. Tim enjoys empowering his students to actively engage, explore, discover, and learn mathematics within his thinking classroom.  In his consulting work, Tim facilitates engaging Building Thinking Classrooms workshops pertaining to assessment, and also facilitates active and engaging educational technology professional development workshops for mathematics teachers and administrators.  In these workshops, he demonstrates how such technology can serve as a powerful platform to effectively foster active, student-centered, differentiated discovery-based learning, meaningful remediation, and ongoing formative assessment within any thinking classroom.  Tim continues to author engaging digital resources for math teachers and their students worldwide, and regularly shares ideas and resources for teaching and learning across his social media platforms, through which he collectively has over 500,000 followers.