I teach, and I wouldn't expect tips. To be fair I'm in the UK, but we still have a tipping culture over here - not quite so much as the US but it's still there.

I get Christmas presents from some of my students - depending on the age of the person it's usually either a bottle of wine/scotch or whatever or a drawing they did of me playing a guitar.... bless 'em...

Your teacher will obviously be grateful, but he/she won't expect a tip or be offended in any way if one isn't offered.