Reddit mentions of Bluetooth Keyboard, Jelly Comb Universal Wireless Bluetooth Keyboard Ultra Slim Compatible for Apple iOS iPad Pro, Mini 4, iPhone X, Android Tablets (Galaxy Tab), Windows Mac OS and Later (Black)

Not really, I understand if you type essays almost everyday - but if you do it once in a blue moon, then there are many bluetooth keyboards the size of an iPad. And if you don't like that, then there are also bluetooth silicon keyboards, so you could just roll it up and stuff it in your backpack.

On a side note, if it's allowed by his prison's rules, and if OP can afford it, a small bluetooth keyboard for his android phone, for example this one on Amazon, ~12$ (w/o batteries) and something like DroidEdit (free code editor, first google suggestion with a decent rating - there is surely way better solutions (I'm a Vimmer myself but won't recommend it to new users)) or equivalent might help OP getting started - as he seems interested in frontend Web development, he would be able:

• to code in his cell in relatively decent ways (almost real keyboard instead of virtual keyboard, so, better typing, more screen space usable because it will not be used by the virtual keyboard)
  
• syntaxic coloration of his code thanks to a correct editor, which will help differentiate keywords, variables, and such
  
• Test his code through the available browsers in Android (Chrome, Firefox)
  
  Of course it's clearly not the perfect developing workstation, but it should help OP getting things done with the tools he has at his disposal (minus the keyboard, which I hope he would be able to afford).
  
  Wishing OP the best: having the will to learn, especially in an environment like a prison, is the key to your future. Sorry for any mistakes in this post as english is not my main language.

Hello!

My set up is pretty compact all things considered, if you're looking for function and form.

I have this bag

This bag is just wide enough to fit this keyboard which is full size.

Paired with this mouse but I'm sure any bluetooth mouse will do.

And then a simple usb 3.0 hub

Just grab a cheap Micro to full HDMI and you're golden if you're traveling etc. This is my travel bag, have brought it with me to St. Louis, Northern Michigan and Boston, no issues and handy to have everything.

It's great for what I use it for, mainly sending fairly short emails and editing papers. If I was going to be typing out anything over a page or so I would opt for a bit more expensive one. It isn't quite big enough to type as well as I usually do, but for $12 I won't complain too much. I've used it 4-5 hours a week for a year and have no had to change the batteries yet.

https://www.amazon.com/dp/B00NOE7412/ref=cm_sw_r_cp_api_i_Bt5PCbGWBVKEW

If you can buy a Bluetooth keyboard, then it becomes a million times easier! I use one connected to my phone on road trips and when visiting family.

They're only fifteen bucks on amazon!

Edit: u/Ed727 already shared this wisdom :P

You can get her a bluetooth keyboard for quite cheap to hook up to it :O?

http://www.amazon.com/Jelly-Comb-Universal-Bluetooth-Smartphone/dp/B00NOE7412/ref=sr_1_2?ie=UTF8&qid=1422422516&sr=8-2&keywords=bluetooth+keyboard+tablet

I'm way ahead of you...


Jelly Comb Universal Bluetooth Keyboard Ultra Slim for Windows Android iOS PC Tablet Smartphone, Black - $11.99

Logitech Bluetooth Mouse M557 for PC, Mac and Windows 8 Tablets (910-003971) - $22.10

I admit I did splurge on the mouse, but hey live a little.