What I have found when teaching light people is , boards tend to float on top of the water , ( cork ) . No forward drive apposed to drifting in the water is the first thing a sailer starts to understand .The ideal small , short board with a CB doesn't exist . The big floaty wide GO is really like a cork and won't work . A older longboard works but won't turn around well . The best I found for teaching , light and heavy , is a 1 m wide formula board . Super wide and stable , with the sharp rails go upwind great without a CB and turn on a dime . Only problem is that they are slow . (We're talking non planing learning ) . The joy of going out and returning to the starting point is ace .As soon as they are wanting to go faster , they are at next stage and hooked .