Monolingual or Bilingual dictionaries?

I prefer bilingual dictionaries for lower levels.  This gives them a quick answer to their questions, without raising a whole load of new ones. 

For higher levels, monolingual dictionaries are better, and students at this level are more tolerant of them, I think, and less likely to feel demotivated if they don't fully understand something.

I have to say that I don’t use dictionaries a lot in my classes.  We don’t have many of them in the school.  With my CAE class recently, I recommended that they downloaded the word reference App, as I find this very useful myself.  I quickly looked up the word for 'holly' the other day, for example, & we all learnt something!

I very often rely on my own knowledge of Spanish/Catalan to provide students with a translation in class. Nearly all my classes are monolingual, which makes this possible.