I teach frog kicks on the surface on their backs, as if their knees break the surface, they know they are breaking at the waist and develop the feel for how their body needs to be and I can speak with them. I don't like teaching frog kicks at the surface as I don't know how to get students to not break at the waist there.I'm not sure I understand... is this a real question? Most instructors teach from the bottom up. That's a hard go for me, so I teach from the top down. Let's get them trim and comfortable on the surface with a slow frog kick. 5 to 10 laps should do it. We can even do mask clears and OOA right there. But, after the swim and snorkel test, they are on Scuba. Once they are comfortable, let's get some weight on them and let them swim just above the bottom.