Lectures for Foundation IX/X Almost all recordings are done LIVE during online classes. Channel youtube.com/123iitjee can be checked for other videos. Motion (Foundation IX) – 7 Classes Number Systems (Foundation IX) – 8 Classes Matter in Our Surroundings (Foundation IX) – 6 Classes Reflection & Refraction (Foundation X) – 6 Classes Triangles (Foundation X) – 9 Classes