I second Hitfilm Express too (It’s free!!). I have only been experimenting with it and it seems very capable. There are lots of tutorials on youtube to help you learn the software. The only downside that I see with it is that it takes forever to open on my computer (2.7 GHz Intel Core i5, 8 GB 1600 MHz DDR3, iMac 21.5-inch, Late 2013). SSD might help?
As @meng said, Adobe CC is very nice, but expensive.
Definitely agree with @Barin about online file sharing. They are easy to access and share among students. Plus, nowadays most students are familiar with using online file sharing such as the ones mentioned above.
For our reveal video, we used iMovie ( ). I really like iMovie because I use it for school projects and I know my way around the software very well. I generally, avoid using any of the stock iMovie effects because they are wayyy over used. We made our text animations in keynote, and used a green background so we could green screen it onto the video. That worked pretty well, and its a nice trick if you don’t have access to other editing software. Looking back, we probably should have used a better camera for the video footage.
As far as online options go, there aren’t any good ones that I have used. Many of them have cheesy stock animations, or put a watermark on the final video (pay to remove water mark).