
A Math Circle is a planned moment to let a group of children work on a complex open math problem in a mix of (small) groups and individually. Different strategies can be used, and different solutions may occur. In addition, students may define their own mathematical questions to research, discover patterns, and test solutions. They can reach so called “aha” moments. Math Circle can be offered as part of the math curriculum, or as an afterschool class, in a small group during independent working time or instead of a math hour.
The Teacher's role is to carefully select the problem(s), and provide specific guidance during the Math Circle. For all or for a select group A Math Circle has a low entry level (all can participate) and a high ceiling (much is possible), but it has been especially of interest to advanced or gifted learners. Many children might be interested to participate because of the possibility to integrate different knowledge areas, the possibility to experiment and research, and the open character of the problems More than 100 Years Math Circle has been happening for more than 100 years already, in a variety of countries including the United States, and since 1907 in Bulgaria. My Experience I first learned about Math Circle from the curriculum coordinator when teaching at a school for gifted children. All new teachers received training to provide Math Circle in their math classrooms. Students at this school were placed in math classes based on their individual level. In my 6th grade math class were students from the 3rd ,4th ,5th and 6th grade homerooms. Many American States provide afterschool Math Circle programs for elementary, middle and high school students, as well as a teacher Math Circle. 
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