Most laptops are either light or powerful, so I will ask, what are your needs for this laptop aside, you know using Microsoft, email, web browsing and play Facebook games ?
My wife did her Master's Degree in Anthropology and she used the Dell Inspirion 15" series 3000 with I3 processor and only weight 5 pounds and is 22mm thick she loved it and did everything I stated above.
http/www.dell.com/en-us/shop/category/laptops?~ck=mn&appliedRefinements=1351,101
just to compare it to a "gaming laptop " such as those below would be foolish of course, butr for educational need the Dell15 3000 I3 is powerful plenty and is about 450$
ASUS ROG GL752VW-DH71 17.3-inch Gaming Laptop 900$
Dell 15.6-Inch Gaming Laptop (6th Gen Intel Quad-Core i5-6300HQ 760$
Acer Predator 17 Gaming Laptop, 17.3” Full HD, Core i7 1300$
MSI GE72 Apache Pro-003 17.3" Gaming Laptop Notebook 960$
there are a few lists out there about college laptops to give you more ideas
http/www.techradar.com/news/mobile-computing/laptops/10-best-laptops-for-students-983385