Experts say lessons marketed by digital education platforms like Byju’s and Yuanfudao are more an innovation in test-prep delivery than in learning outcomes (Meaghan Tobin/Rest of World)

byju yuanfudaotobin, Meaghan Tobin / Rest of World:Experts say lessons marketed by digital education platforms like Byju’s and Yuanfudao are more an innovation in test-prep delivery than in learning outcomesInvestors have poured billions of dollars into digital education platforms like Byju’s and Yuanfudao. But are students learning anything