I'm a skint student too

and I live in London, where food is a lot more expensive than in the US. I'm also wheat intolerant so I usually have to spend a bit more than most people, but still manage to get off for little money.
0) Starting costs when you start cooking new things are going to be higher, but because I love cooking, I've accumulated all sorts of cooking sauces, oils, vinegars, herbs and spices over the years. That also includes things like jam, peanut butter, spread etc.
1) I bulk buy meat or fish on special offer, or reduced to clear as it's on its last date, then freeze it - cheapest way to buy meat. Tinned fish, surimi fish etc are also good options.
2) I have a cupboard filled with rice, pasta, millet, quinoa, tinned pulses, dried pulses etc.
3) Every week, I buy cheap produce: veggies, fruit and stuff that goes off: fruit juice, milk, bread.
Then you mix and match as you like. E.g. today I found some canned tuna and some frozen lean beef. This is what I'm making and it's dirt cheap:
Lunch - Sweet Tuna Salad: canned tuna, chopped celery, chopped apple, tbsp raisins, 1/2 lemon juice
Dinner - Beef Ramen: instant miso soup sachet + boiling water, 1/2 chopped onion, 1 tsp oil, beef, rice noodles
You could make something completely different. For example I could have done a tuna melt sandwich, a tuna and sweetcorn salad, served the beef grilled with homemade tomato salsa and a side salad etc. The key is to be creative. Whatever you have left in the fridge or in the kitchen, make something with it!
Other cheap dishes are:
- egg fried rice (doesn't have to be calorific just use little fat and lots of veggies)
- scrambled eggs/omelette
- Stir-fries: 1 onion + meat + oyster/soy sauce mix + add veggies and cook
- Hummus: chickpeas, lemon, olive oil + if available tahini + if required 1tsp yogurt
- Lentil and pulses: e.g. borlotti bean pasta sauce: brown 1 onion in pan, add tomato paste, add tin borlotti beans washed + tin green beans, add 1 cup stock, reduce, serve over rice or pasta
- Low fat cottage cheese: add anything you like in it and great source of protein
- Lentil soup: can lentils or 1 cup soaked lentils, 1 onion, 1 carrot
- Curry: onion + meat + curry powder, then add tinned tomatoes and veggies + freeze remains
Does that help?