Complex sentence: Once back he taught art at Aleppo's Tajhiz scool and also maintained a vibrant studio; his work from that period shows an evolution in mediums to include sculpture, oil painting and photography.
Split into simpler sentences: Once back he taught art at Aleppo's Tajhiz school and also maintained a vibrant studio. Surviving work from that period shows an evolution in mediums to include sculpture, oil painting and photography.