dictionary
One of the biggest things I assumed in 3rd grade is that they could do abc order easily. Many of them can't! We worked on that extensively before we did dictionary skills. There was no way we could go into dictionary skills if they couldn't figure out how to do abc order to the 3rd and 4th letter.
I have a class set of dictionaries, which helps for everyone to have the same one. I'd start with an easy word and show them how the guide words are used. I have some worksheets to go along with it (sample words pulled from a dictionary), but they're at school. Then we'd look at the one word and see everything the dictionary tells us about that word (part of speech, pronunciation, several definitions, etc...). I've also put them in small groups before and had them do a "scavenger hunt" for things - like what part of speech is character? What is the most common definition of friendship? I just had them all listed on a sheet for them to find.
After we practiced several days (it took a lot of practice!), they loved having dictionary races!