Test before allowed to play rank

There needs to be a system in place that each player has to go through a few tests before allowed to enter a ranked games. I suggest that there should be 5 tests based on each position (adc,support,mid.jungle,top). possibly some sort of map with bots where you have to do objectives that complement each position. each test needs to be scored at 80% passing grade. This way bronze level starts already challenging and it moves from there. Taking away the feeders, spammers, trollers, quitters etc. It can also be a training ground at the same time where players can learn and practice to use champs. Of course the bots need to be challenging enough that not anyone can pass. So what you think ? you think this would work?