It's sort of hard to take a website name like English Banana seriously, but after taking a look at their Big Grammar Book for elementary-age students, I think it's quite a find!
The following text is from the Big Grammar Book's introduction:
About the Big Grammar Book
"It's jam-packed from cover to cover with a great selection of photocopiable worksheets taken from the popular English Banana.com website. We wanted to provide teachers with a really useful book of no-nonsense grammar worksheets that they can dip into and use in class with students at ESOL Core Curriculum Entry Levels 1 & 2 [Elementary Level]. It is also ideal for students to work with at home since the answers are all printed at the back.
"The book is divided into four parts and is graded in difficulty, so that it begins with some basic stuff and builds up to more challenging grammar activities. It features a selection of Essential English worksheets which provide practice for crucial basic areas of knowledge for learners at Entry Level, like using numbers, writing the alphabet, spelling days and months correctly, and so on.
"We hope that you find this book a big help and full of material that you can use with your learners. A big thank-you must go to all the students who have already been trialling these worksheets in class. Their feedback has been invaluable to the development of this book..."
If you want to look at a few of the pages, to sample the book, or just want to download it slowly, go to this page for a list of available pages with links to download them (these download are .pdf files, straight from the English Banana site).
If you'd like to download the entire kit and kaboodle in one click, go here to download the full grammar book (this download is through CNET's trustworthy and spyware/virus-scanned Download.com site).
Thank you, Jenn, for this high quality, 100% free, educational find! Send your suggestion to me at loriseaborg@gmail.com
Subscribe to FreelyEducate here or keep up with FreelyEducate tweets (Twitter) here: @freelyeducate

