We used the What's in the Bible? VIDEO series for our summer session and I love them. Now I will use clips from them for lessons as applicable.
Each DVD has two 26 minute episodes RIPE for teaching with.
From the creator of Veggie Tales... these are NOT "thinly Christian" 'entertainment' videos like Veggie Tales. Rather, they have seriously fun Sunday School content for home and church use.
Supporting Members of Rotation.org can print free outlines to each of the 13 DVDs in the series.