Here's something I found in my Life States Dynasty. Quick promotions!
When my sixth generation, Mary, grew up, she rolled the LTW of Creature Robot Cross-Breeder. I had her get to level 10 in Nectar Making first, then sent her to science. If you get to work at least 30 minutes before your scheduled shift (as in, inside and the work meter going), you should get a notice that says that your coworkers noticed you've arrived early. Combine this with Multi-Tasker LTR, and Mary had no problems getting to level 10 Science in about 12 work days.