Hi guys, I'm taking a first year bridging course lab and so the labs are really simple, but the students have no Physics knowledge. They are dealing with radiation mainly, but some are struggling with the concept of Multi-Decay chains. They have a lab that has to do with Parent decaying to the daughter, which then decays to a stable grandaughter (the program draws graphs of vairous half-life situations). Anyway even after I explain it to them I feel that they are still lost. As a result I realise I'm probably not the best teacher, but I'd appreciate it if any of you guys knew of any good sites that give a real basic description of multi-decay chains, with diagrams illustrating transient, secular and no equilibrium. I feel bad that I haven't been able to make them understand this too well and I really want to help them as much as possible. Thanks for reading this.