What should I pack for Nepal?
First and foremost: pack as light as possible!
Remember that you are guaranteed to come across things during the semester that you will want to take with you as souvenirs and give to friends and family. You should make sure to have space in your luggage to bring home memories from your time in Nepal.

Clothes
In the spring, the weather will be a bit chilly during the first few weeks, but it will get warmer over time.
In the autumn, you can expect high temperatures and a lot of rain during the first few weeks, and more pleasant temperatures with less rain in the second half of the semester.
It is likely that much of your regular summer wardrobe will not be suitable outside of Lakeside (the area where the students live). Tight tank tops, miniskirts, and short shorts are not considered appropriate attire in Nepal.
Bring t-shirts, light cotton pants, and long-sleeved light sweaters for the evening.

Bring swimwear as this can be hard to find in stores in Pokhara.
If you're planning to go hiking in the mountains, bring appropriate clothing and hiking boots. You can buy or rent hiking gear (including shoes) from shops in Pokhara, but the quality varies.
You should bring a cap or sunhat to protect yourself from the sun. You will probably wear sandals, flip-flops, or other light shoes in the heat.
Bring a pair of wool socks for cooler nights, hiking, and excursions.
Toiletries
You can find most toiletries in Pokhara. Bring any prescription medication you need.
You should bring enough sunscreen from home for the entire stay. Most sunscreens (and some other products) in Nepal contain bleaching agents.
Make sure to check the expiration date if you still decide to buy sunscreen in Nepal.
You can buy shampoo, conditioner, deodorant, and so on in Pokhara. However, dry shampoo is not easy to find.
Bring earplugs if you are a light sleeper.

Other
You don't need to bring regular towels, but you should bring a bath towel.
You can buy paper, pens, staplers, and so on in Pokhara.
Bring your laptop and textbooks.