To be honest though I think a *better* use of your time would be to
(a) think up some variations on the exercises you've already been given;
(b) see if you can help other students who are stuck; explaining stuff that you think you understand and fielding their questions is a great way to consolidate what you know and to learn new stuff. I learn new stuff all the time posting here; often a question will trigger some interest and I'll go off and look it up. And I'm not exactly new to this; I started programming in about 1981.