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“Empirical Analysis of PowerPoint Projector Use on Secondary School Performance in Physics and Chemistry in Malawi: Analisis Empiris Penggunaan Proyektor PowerPoint terhadap Performa Siswa Sekolah Menengah pada Mata Pelajaran Fisika dan Kimia di Malawi”, SPW, vol. 2, no. 1, pp. 69–88, Feb. 2026, doi: 10.64728/sirad.v2i1.art6.