Ekalavya learnt many things by just considering Drona as his teacher. But he is on the side of Adharma.
Many websites are claiming that Swami Vivekananda told the following lines
Ekalavya, an ideal for modern students, learnt archery without any external help. By self-effort and faith in one’s power, longing for knowledge and by self-reliance, one can do miracles.
Was it really tell by him?