Indian edtech company Byju's is looking to raise more than $600 million at a valuation of $15 billion, with plans to use the fresh capital in part to make acquisitions, TechCrunch reported. The Bengaluru-based company was targeting a valuation of $12 billion after raising $200 million in November, a Bloomberg report at the time indicated. Byju's, which is backed by investors including Silver Lake and Tiger Global, provides an e-learning platform for K-12 students.