(a+ii+2) Khan Academy offers lessons on subjects from mathematics to science and history for students
(b+iii+1) Many governments, schools and organizations have partnered with Khan Academy to integrate its resources into classrooms.
(c+i+3) His mission is to ensure that anyone, anywhere can access high quality education regardless of their background or financial status.
(d+v+4) He started making educational videos using simple and clear explanations and eventually created thousands of lessons.
(e + iv +5) Salman Khan is an educator and entrepreneur of Bangladeshi origin providing free education online to make learning accessible to everyone.
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