I'm in favor of Evernote too. Add Skitch so that you can easily markup the photos, and it should provide an excellent solution. You'll probably want to experiment a bit to find the best combination of titles, notebooks, stacks, and tags to keep your stuff organized.
Don't expect to get it all in a moment. It's a deceptively powerful tool. I've had it for over a year, and I'm still finding better ways to use it.
Once created you can email a note directly to your supervisor, or if you can talk him/her into getting an Evernote account, you can just share the notebook so that they are always up to date. And you can access Evernote on pretty much any device or computer that exists.
Try the free account. If you find it works, then you'll probably need to upgrade to the paid account to cope with the volume of pictures involved. But at $5 or less a month, I think you'll find it worth the connivence and flexibility.
About Pages:
A little advice about Pages. After you add the picture, select it, tap the paint brush icon, and go tot he Arrange tab. Tap Wrap, and turn off Move with Text. Your picture will then stay where ever on the page you put it. There are several other things you can change here as well.
Once you have the picture exactly how you want it, you can Lock it against further changes. The Lock option only turns up after you turn off Move with Text.
Personally, I wish Move With Text was off by default, but I'm sure there are others that want the pictures to move with the text.
You can treat text the same way. All you have to do is add a text box via the Media icon (+) and then, like the picture, turn off Move with Text for that box. Now you can drag and leave text anywhere you want on the page.