I came across ModelOff on LinkedIn last week and thought it was a great initiative. They call themselves the financial modelling world championships and have been running since 2012.
As I mentioned in my last post, getting real world experience applying quantitative analytical tools to a wide range of problems is one of the best things you can do for your career; especially early on. From what I have seen, their collection of past questions available on their website are a really good mix of the sort of range of problems that you come across as a financial/economic consultant.
I must say, I am tempted to register for this year, but, I'm not really in game shape at the moment. Sadly, I spend more time working with Word, and Powerpoint these days than Excel.
Whether you want to sign up or not, if you're interested in improving your modelling skills, have a look through their problems and give them a crack.