Is there some thing wrong in my blog?

I use blog to instrust my students.I often sign homework to them.But I think some students are very lazy,they prefer palying games than look through their homework.I think there must be some thing...

how to prepare your lesson

I am a science techer,I often prepare my listen on the day befoe I give the class. Empirical teachers often told me that I shoule prepare a lesson on the day near the day I give the class,then I...