She might like reading through parts of the Lost Girls’ blog. They have a whole section on packing light: http://www.lostgirlsworld.com/category/planning/packing-wardrobe/
I like the Eagle Creek packing things too. The “cubes” are really handy.
I’d also encourage her to speak with people who made this trip in previous years, and to pay particular attention to what those people say they never used, and what they realized they couldn’t live without during the trip.
Here’s the Lost Girls’ post about what they packed for their planned year-long trip: http://www.lostgirlsworld.com/2006/01/what-we-packed-html/
D2 needed her own pillow and stuff animals. She also went out a lot in London, so she needed nice clothes, bags and shoes. I also do laugh when I hear kids (especially girls) could travel with a backpack and carry on.
My daughter did a 6 week study abroad in Australia where she had to pack winter clothes, summer clothes, and a sleeping bag! She did it all in one large suitcase, carry-on, and packback. The study abroad program gave her a suggested packing list.
The best tip she received was to take plenty of t-shirts and use them for day wear and PJs. Then when it was time to come home, throw them away so she had more room in her suitcase for souvenirs. It worked.
She is now in Denmark for a two year master’s program. She really pared down her wardrobe and shoes/boots, so that everything she absolutely needed fit into two checked bags (50 lbs each), a carry-on, and a backpack. She used the vacuum sealed bags for sweaters and bedding.
My daughter, like yours, took a ton of stuff to her dorm when in undergrad, but rose to the challenge to pack everything she needed for two years in a few suitcases. She did end up purchasing a winter coat and boots over there.
I’m just pointing out that it can be done.
The other thing I would suggest is for your daughter to become educated in the acceptable dress for the area she will be staying. When my daughter did a study abroad program in France, they told her no shorts. Only dresses (preferred) or pants.
A couple of people have mentioned the Eagle Creek packing things. I just purchased and Eagle creak bag, and received some of the packing things. But I don’t know how to effectively use them. Any advice? Feel free to PM me. I don’t mean to hijack the thread.
I don’t mind- I wouldn’t mind hearing
This probably is obvious but make sure and weigh the bags at home before you go so you know it’s under the weight limit…
The good thing about summer in Europe is that you don’t need as much heavy clothing. Also the euro is now possibly as cheap as it has ever been against the dollar which does make a huge difference when you do have to buy things. That wasn’t the case when younger d did semester abroad when it was at the higher level. Things she had to buy included a bag to carry books and notebooks for classes that we had not thought of. She had a backpack for traveling and a handbag but she did find a suitable tote kind of a bag at an H & M. Because her program included a ski trip over Thanksgiving weekend, she did have to buy some kind of snow pants. I had brought over waterproof gloves that she had at home when I visited before then along with more of her winter things including a fleece that she could use for that ski trip by layering underneath and I did take home a few of the summer things that she had brought in August. All of the programs that my daughters did included bedding but they did bring extra towels because you never know what the towels will be like, but to save room I told them to throw away at the end rather than bring home. Also be prepared that some of the clothes that they do bring home will have to ultimately be thrown away because they don’t wear as well in the washing machines/laundry detergent. A lot of her tops came back very dingy. She had access to a washing machine in her student apartment but there wasn’t a dryer so they had to dry their laundry towels, sheets and all on drying racks which did take a while. I think my older d did have access to both washer/dryer in the student housing she had. She did buy boots while she was there, also did a fall semester program but she was in Rome so it was warmer weather for longer. She did spend some time in London on her way home in mid-December and Paris for Thanksgiving weekend where it snowed so you do have to have plenty of clothes that you can layer.
I’m sure you thought of this - but the suitcase should be rolling luggage with a long pull out handle that you can pull behind yourself.
Thanks everyone!
Eagle Creek Packing Things:
I use the envelopes to pack shirts, jackets, and pants. Just follow the folding examples on the board that comes inside the envelope, stack things up, squash it flat with the upper board, and close tight with the velcro. We got a dress suit to Australia that way for a conference once. Sometimes when I’m traveling close to home, and/or with only carry-on luggage, after folding and stacking everything, I pull out both of the boards so that the bundle is a bit lighter and more flexible and hence easier to fit into luggage.
I use the cubes to keep socks, undies, rolled t-shirts, pyjamas, etc. organized. I use the smallest cube to corral all of the cellphone chargers, travel alarm, etc. No more digging in the bottom of a suitcase for one lost sock or a mislaid charger. For stays longer than just a night or two, I can set the cubes into a hotel bureau and have all the drawers instantly organized.
We got a whole bunch of these years ago during the Container Store’s annual travel sale. Happydad, Happykid and I each have a set in a different color which makes it easy to keep track of everyone’s stuff. Happykid is very good about using them. Happydad I’m still working on.
Download “Google Translate” app. It’s free, and it works really works well.
S had to pack to go to France for an entire year: four seasons. Luckily, the winters in Lyon are not severe, at least not to a kid acclimated to northern New England. 
The complication was that for the first couple of months he would be working as a tour guide and moving around a lot, before vacationing with cousins in the UK and Ireland, then moving into a university in September. I got him the largest acceptable size rolling duffle, and a European size carryon. Those, plus his computer bag, were all he could bring. We decided that he would buy inexpensive linens there when he got to the U, as well as whatever utensils he needed, and either sell them when he left or give them away. We picked out linens on the French Ikea website, and he went there and purchased them. He was lucky in that one of his apartment mates had lots of cooking stuff as was happy to let him use it. He bought a couple of cheap plates and mugs, and basic silverware. (He lived in a 4-person student apartment on campus.)
S is a bit of a fashionista, and acquired some new items in France. I think he left behind some of the things he brought with him that were very worn or didn’t appeal to him any more. We traveled to visit him at the end of his stay, and carted back some of his clothes and books, since we traveled light and didn’t use our full baggage allowance on purpose.
I think that a lot of this has to do with distinguishing between things that you would like to have, and things that you really must have. Of course, if the parents are able and willing to pay fees for extra baggage coming and going, as well as pay for transporting it locally on the other end, that’s another matter.