Parents are concerned that children who have trouble in school will 'fall through the cracks' in the school system. [=will not be given the help they need; will graduate without anyone noticing that they are unable to do the work]
The program is meant to help workers who may have 'slipped through the cracks' [=who may have not been included in other programs] because of their age.
You ought to 'get cracking' [='get going; get moving'] on that assignment. [=you should start working on that assignment right away]
(..) Who am I speaking to? Can I get your name and number? With those details plus a dictionary brute-force attack, it'll take my program maybe two minutes to crack his password. What I wouldn't give to be normal. To live in that bubble, the reality of the naive. That's how I justify this. (..)2015 TvShow: Mr. Robot Title: eps1.0_hellofriend.mov Season: 1 Episode 1