Of the four designs, I like #19 the best in terms of color and all have the interesting integration of people into the image design. The added colors really make it more visually interesting. I'll need the final design to be square for the purpose I have in mind.
besides integration of people, my design describe Yin-Yang and there are two palm of hands that keep the balance describe learning. I've uploaded #63, #64, #65 with more modern feel. Thanks