▁who ▁were ▁excellent ▁at ▁their ▁craft ▁and ▁even ▁with ▁budget ▁constraints ▁he ▁avoided ▁casting ▁less er ▁actors . ▁ ▁Bar nes ▁worked ▁with ▁Encyclop ædia ▁Britannica ▁for ▁over ▁ 2 0 ▁years . ▁His ▁immense ▁amount ▁of ▁educational ▁films ▁remain ▁screen ed , ▁circul ated , ▁and ▁present ▁today . ▁After ▁going ▁from ▁making ▁document ary ▁film ▁to ▁academic , ▁he ▁stayed ▁in ▁educational ▁film ▁from ▁the ▁early ▁ 1 9 5 0 s ▁and ▁per se ver ed ▁into ▁the ▁late ▁ 1 9 7 0 s ▁when ▁educational ▁film ▁experienced ▁a ▁golden ▁era . ▁Edu c ational ▁films ▁were ▁typically ▁used ▁to ▁ign ite ▁class room ▁discuss ions ▁after ▁the ▁screen ing , ▁that ▁meant ▁that ▁the ▁context , ▁history , ▁and ▁complete ▁story ▁had ▁to ▁be ▁told ▁in ▁a ▁short ▁period ▁of ▁time . ▁These ▁discussion ▁periods , ▁according ▁to ▁educational ▁the or ists , ▁eng age ▁with ▁students ▁better ▁than ▁lect ures ▁and ▁reading ▁by ▁allowing ▁students ▁to ▁express ▁their ▁opinions ▁and ▁learn ▁from ▁speaking ▁to ▁each ▁other . ▁Later , ▁Bar nes ▁moved ▁away ▁from ▁film ▁making ▁and ▁wrote ▁plays , ▁some ▁were ▁produced ▁in ▁the ▁U . S . ▁and ▁Canada . ▁ ▁Encyc lo pa edia ▁Britannica ▁ ▁In ▁ 1 9 5 2 ▁he ▁emb ark ed ▁on ▁his ▁first ▁project ▁with ▁E B ▁Films , ▁with ▁Gordon ▁We isen born ▁as ▁director ▁and ▁Bar nes ▁as ▁writer ▁and ▁producer . ▁People ▁Al ong ▁the ▁Mississippi ▁is ▁said ▁to ▁be ▁one ▁of ▁the ▁first ▁port