I hope this makes sense to you. It sounds like you have already figured out that with a growing teen and two additional children in the household, this will be a good start but that more will be needed over time. By doubling these quantities my guess is that you will be better prepared, food wise, than 90% of the population. And even without doubling the quantities, you will be better prepared.
Effective preparedness can be simple, but it has to be rooted in an honest and systematic review of the risks you are likely to face. Plenty of excited newcomers begin by shopping for ballistic vests and night vision goggles; they would be better served by grabbing a fire extinguisher, some bottled water, and then putting the rest of their money in a rainy-day fund.
The same goes with flour.  To make flour usable, you also need yeast and baking powder plus the skill and know-how to bake. Not only that, you most likely will need an outdoor oven of sorts – especially if the grid is down post disaster.   That, and more, will come later, but for now, while covering the basics, it is much simpler and far more practical to stick with easy to cook foods that can be combined into interesting meals without the need for much experience other than opening a can or a package.
Alas, most of the popular diets make this task awfully hard: they force their followers to abandon a lifetime of dietary habits, taste preferences, and eating schedules - and stuff themselves full of kale, turnips, quinoa, acai berry, or whatever else happens to be this week's "fat-fighting superfood". To add insult to injury, most of the nutrition fads are not actually backed by real, reproducible science; suffice to say that in the 70s, table sugar was widely touted as a dieting aid. Even today, weight loss advice tends to revolve around robustly debunked concepts - say, the existence negative calorie foods, the alleged superiority of low-carb but high-fat diets, the evils of HFCS and aspartame, or the significance of eating meals on a particular schedule thoroughout the day.
They have a great selection of food storage kits, from 72-hour emergency kits to the Deluxe 1 Year Kit. However, Augason's best offering is the incredible selection of individual ingredients. This includes dehydrated and freeze-dried vegetables and fruits, rice and grains, baking ingredients, powdered milk and eggs, freeze-dried yogurt, beans, gluten-free products.
I rotate my storage a lot and used it last year when my husband was laid off. What I found is that I prefer smaller cans because I usually don’t need larger sizes. We have three kids left at home at this point. We still only cook for 5 people, one meal at a time and if you are in a situation where you don’t have refrigeration you may not want to have to store the large can leftovers.
This step is imperative, but it is one that a lot of preppers overlook, to their own detriment.  It is absolutely essential for you to know the coupon policies of the stores you frequent. Some stores have a limit on how many copies of one coupon they will accept. Some stores have a policy where they will double any coupon worth less than $1.00.  Some stores have special promotions there they will double all coupons, or triple all coupons, on certain weeks of the year.  Some stores have policies where if you have a coupon worth more than the value of an item, they will pay you the difference, while other stores will not give you anything more than free. You need to know the policies of each store to help you determine which stores have the best deals.  You also need to know when to shop at each store, since you may be able to get a better deal during a double or triple coupon week. This will require some consistent research, but keeping track of store policies can pay big dividends.
When buying food, don't fall for "diet", "reduced fat", "low sugar", or "low carbs" ice cream, yogurts, cakes, pizza, pasta, and so on - the differences are so minor that you might as well have the real thing and stop fooling yourself. Watch out for deceptive portion sizes, too. For example, Cheetos are labeled as 150 kcal per "serving", but there are almost 10 servings in a regular bag! Frozen fries are another great example: they look pretty low-cal until you realize that a serving is just 10-15 pieces or so - certainly not enough to make you feel full.
Advertising your wealth aside, another sure way to invite burglars is to make it seem that your house is unoccupied: packages piling up in front, an overflowing mailbox, an empty driveway, all lights turned off at night. Asking a neighbor to park a car in your driveway, putting some lights on a multi-cycle timer ($8), and having someone pick up your mail, are just several examples of low-cost solutions that are worth trying out whenever going on a longer trip.
A veritable industry has sprung up around the prepper movement. James Rawles, author of the non-fiction book How to Survive the End of the World as We Know It and a pair of best-selling novels on survival, says 130,000 people regularly read his survivalblog.com, where he and numerous contributors provide tips on how to prepare. The former Army intelligence officer has 40 advertisers selling everything from seeds to silver, and 30 more advertisers on a waiting list.

“One misconception about prepping is that you’re always thinking there’s going to be some kind of epic disaster,” she told me over the phone from Virginia. “The most common disaster that we prep for, or that happens to us, is a financial problem.” A longtime single mother, Luther said her interest in food storage grew out of a period of “abject poverty” following the 2008 recession. Lisa Bedford, a Texas-based writer who runs the site The Survival Mom, told me she got into disaster preparedness around the same time, when she wasn’t sure if her husband’s construction business would survive the downturn. (Bedford also works as an independent consultant for Thrive Life, meaning that she promotes their products online, and receives a commission on purchases from customers she refers to the company, as well as a discount on products she buys herself.)
These documents will assist rescue workers and first responders in identification and in providing you with adequate medical care, if needed. It also would not hurt to include some pictures of yourself with family members.  I like to store this information on a flash drive along with other information such as survival manuals, home inventories and such.

I don’t care if freezing doesn’t kill the bugs. The flour will be used to cook something. It will go into a baked item or be used to coat something for frying. Now I am not saying we shouldn’t take precautions against infestation. What I am saying is there has to be a balance. At what cost (in money, time and effort) is it worth it to make something absolutely safe? Personally, I don’t want to lose focus.
Firearms. A very effective and supremely intimidating weapon, with lethality ranging from 20% for handguns to 80% for shotguns; for a novice user, the effective range is somewhere between 10 and 100 yards. Guns are heavily regulated in much of the world, but widely available in the US - although there are several states or municipalities that make it very difficult to get a permit unless you are a celebrity or a prominent donor.
For home intrusions, you should try to act out various scenarios: say, confronting the bad guy or trying to escape. Take into account that break-ins can happen at different times of day or night. Remember that intruders may have varied intents; some folks may be homicidal or high, but most will just want your laptop and will be very worried about getting hurt. Many robbers work in pairs, too.
At $40 for a case of 12, Soylent does a great job replacing solid meals with pre-mixed drinks that can extend your survival food stores by a few days. Each bottle is 400 calories and contains 20% of your daily nutritional needs. Drink five bottles and you’ve got a full day’s worth. They’re also vegan and nut- and lactose-free, with very clear nutritional info.

Jim Cobb is the author of Prepper's Home Defense (2012) and Prepper's Complete Guide to Disaster Readiness (2013). He has been a prepper for most of his life and has worked almost twenty years in the security management and investigation fields. He also is the owner and lead trainer for DisasterPrepConsultants.com. Jim's primary home online is found at SurvivalWeekly.com. He lives and works in the Upper Midwest, sequestered in a fortified bunker with his lovely wife and their adolescent weapons of mass destruction.
If I can cite the number one reason people become overwhelmed when even thinking about putting aside an emergency food supply, it is the perceived sense of urgency that it all needs to be done right now.  And this, for many, results in complacency and inaction.  Don’t fall into this trap.  Begin with a three day supply and gradually build that up to a week.  After that, add to your emergency food supply week by week until pretty soon, you have three months of food stored away for you and your family.
Resources abound.  With a modest amount of computer knowledge, you can Google around the internet to find all sorts of emergency food and food storage advice.  Be an informed consumer.  Learn about the foods that store well and also about pre-packaged meals that only require a bit of hot water to create a good-tasting and satisfying food experience.

At seventy-seven, living on a tugboat in Sausalito, Brand is less impressed by signs of fragility than by examples of resilience. In the past decade, the world survived, without violence, the worst financial crisis since the Great Depression; Ebola, without cataclysm; and, in Japan, a tsunami and nuclear meltdown, after which the country has persevered. He sees risks in escapism. As Americans withdraw into smaller circles of experience, we jeopardize the “larger circle of empathy,” he said, the search for solutions to shared problems. “The easy question is, How do I protect me and mine? The more interesting question is, What if civilization actually manages continuity as well as it has managed it for the past few centuries? What do we do if it just keeps on chugging?”
To manage that fear, Dugger said, he has seen two very different responses. “People know the only real answer is, Fix the problem,” he said. “It’s a reason most of them give a lot of money to good causes.” At the same time, though, they invest in the mechanics of escape. He recalled a dinner in New York City after 9/11 and the bursting of the dot-com bubble: “A group of centi-millionaires and a couple of billionaires were working through end-of-America scenarios and talking about what they’d do. Most said they’ll fire up their planes and take their families to Western ranches or homes in other countries.” One of the guests was skeptical, Dugger said. “He leaned forward and asked, ‘Are you taking your pilot’s family, too? And what about the maintenance guys? If revolutionaries are kicking in doors, how many of the people in your life will you have to take with you?’ The questioning continued. In the end, most agreed they couldn’t run.”

Boxed evacuation essentials. Camping and survival supplies to get you through at least one week, in case you need to leave home and can't be sure about finding a hospitable location right away. The gear should be boxed or bagged to make it easy to load into your vehicle. Include some amount of water and food, and make sure that the entire kit actually fits into the car. For many US cars, 56 quart storage totes ($19) work very well.
“Next thing I see is, they hanged the colored boy, ’cause they caught him stealing. And they had established, I think, about 1,000 trees in the forest out in Mark Twain to hang people from if they catch them stealing or whatever. And I had a big dog—my dog died of bone cancer of all things two years ago. Buddy was half-Rottweiler, half-German shepherd. He was a dog, and he was with me in this. And I also have a police riot gun, a 12-gauge, that holds eight magnum shells. So I’m seeing all this stuff happening, and then I look around, and my dog’s gone. So I picked up my shotgun and went to look for my dog, and I found five men, and they were already skinning him to eat.”
In tropical areas, a survival kit may have mosquito head netting, additional insect repellent, anti-fungal cream, a machete, water purification tablets, foot powder, matches, a flint strike, a compass, a wire saw, a space blanket, medical equipment (gauze pads, elastic gauze bandage, antiseptic creams, anti-malaria tablets, anti-infection tablets, bandages, etc.), salt tablets, a fishing kit, snare wire, extra socks, a candle, a signal mirror, flares, a sewing kit, safety pins, tinder, tape, a whistle, and rations.