“…Considering the high number of studies examining the effects of differentiated instruction approach on teachers' training and training on children's developmental areas as the subject of the studies, as well as the differentiation in the content, process and product dimensions of differentiated instruction, it is seen that many data collection sources are used. a7,a12,a15,a16,a19,a20,a22,a23 a28,a29,a32,a33,a34,a37,a39,a40,a41 Quantitative data analysis 13 31.7 a4,a5,a6,a8,a9,a11,a13,a14,a18,a21,a25,a36,a38 Quantitative and Qualitative data analysis 10 24.4 a1,a2,a10,a17,a24,a26,a27,a30,a31,a35 Total 41 100…”