Khan Academy: Ideal for junior and high schools students, the Khan Academy houses over 9000 free tutorial ranging from subjects as mathematics, science, science, coding etc. It is a non-profit organization significantly backed by the Bill & Melinda Gates Foundation. Several schools have changed their teaching strategies banking upon Khan Academy where in the students are encouraged to learn at home and an interactive session on classroom is implemented as opposed to the traditional method of teaching in classrooms and assigning home works.

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