I've posted this yesterday https://www.h-mat.cz/en/hejny-method https://www.h-mat.cz/en/hejny-method and a paper describing it in detail http://www.cupress.c

I've posted this yesterday https://www.h-mat.cz/en/hejny-method https://www.h-mat.cz/en/hejny-method and a paper describing it in detail http://www.cupress.cuni.cz/ink2_stat/dload.jsp?prezMat=104065 http://www.cupress.cuni.cz/ink2_stat/dload.jsp?prezMat=10406... It's somewhat related constructivist (or constructionist?) method of teaching mathematics that's actually used in some schools. Would be interesting to hear people's thoughts on that