<![CDATA[The aim of this research is to determine the effectiveness of ethnomathematics-based learning videos to improve the ability to determine the circumference of flat shapes in children with physical impairments. The approach used in this research is SSR with an A-B-A design. This research was carried out in 14 meetings divided into 3 phases, the first phase, namely baseline (A1), was carried out in 3 meetings, showing stable results with a score of 20%. The second phase, namely intervention (B), was carried out in 8 meetings, showed an increase with a score of 70% to 90% and showed stability at the 6th to 8th meetings. The final phase, namely baseline (A2), was carried out in 3 meetings, showing stable results with a score of 90%. These results show an increase in the ability to determine the circumference of flat shapes with ethnomathematics-based learning videos for children with physical impairments.]]>
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