Use a reasonable number of photos per page. If you have a lot of photos that you want to use consider making a main page on that topic and then another or other sub pages. 

1. Example: I want to make a web page of my gardens flowers. I have 38 pictures and want to use them all.
1. I group my photos by topic (in this case color) with no more than 6 per page, for example. (for the small pictures that I used in the example I could have used more than 6 images since file size is small.)
2. I make a new folder called "flw". 
3. Then I make a main page called index.html with several photos and text about where we went and what we did with links to each of those groups of photos. 
4. Then I make several subpages called red.html (4 photos), blue.html  (6 photos), white.html  (6 photos), yellow.html (6 photos), pink.html (6 photos), orange.html (4 photos), and purple.html (6 photos). 
5. On each of the sub pages I would explain the pix or have a paragraph that clearly tells about the page that kids wrote/researched.
6. When I named the photos I name each with the name of the page they are on. Eg b_name for blue, r_name for red, u_name for purple, etc. This keeps page and photos together inside the folder.