Differentiated both students in need of additional support and those who can extend their learning in math. Project-based learning (PBL) using math circles: challenging problem or questionsustained inquiryauthenticityapplication of learningintegrationstudent voice and choiceA public product for an authentic audiencefeedback loops of critique, reflection and refining of the product - including formative and summative assessment.Planning a Class Party (PBL - Math Circle) by The Profound Teacher -