Point it somewhere near the start of the runway, and pray. I keep managing to walk away from them.
GApilut got it in one - you are using both power and attitude to control both glideslope and airspeed. As far as teaching a new student goes, deffinately Power controls glidepath. Think of it in terms of energy - if IAS is constant, the only means you have to control the rate you loose gravitational potential energy, is to change the amount of chemical potential you convert (ie, want more height, add more coal).
Keep in mind that you're dealing with secondary efffects here, not just the initial change - obviousely if you pull back on the stick you will arrest your ROD, but the secondary effect is a loss of IAS and for a sustained adjustment you require a power change.