A general rule of thumb is: if you can’t understand it, neither can we! So instead of directly quoting the text, try paraphrasing it – understand it as best as you can and put it in your own words.
Example – http://www.sandiegozoo.org/animalbytes/t-crocodile.html:
“For such ancient, ferocious-looking animals, crocodilian moms take really good care of their hatchlings! Crocs are one of the few reptiles that watch out for and protect their young until they are old enough to be on their own. The cow (female croc) looks for just the right place to build a nest to lay her eggs.”
This is much to long to have as a direct quote, but it has important information for your report on crocodiles. Try paraphrasing the paragraph, taking out only the most important information for your report. It could look something like this (notice there are no quotation marks):
Crocodile females are protective parents. They carefully search for a nesting place to lay their eggs and then stick around until the babies hatch and are old enough to survive independently. (SanDiegoZoo.org, 2008)