Why Are Middle Schoolers So Tall These Days? A Teacher’s Observations and Practical Tips
Last Monday, I asked my 7th grade math students to rearrange their desks into small groups for our probability unit. I’ve been teaching middle school for 12 years, so I know exactly how much space to leave between rows for kids to squeeze past. When Jake, my tallest student this year, ducked to walk between two desks, his backpack caught the edge of my whiteboard ledge and knocked off half a dozen dry erase markers. I laughed and teased him: “When did you get so tall? You were up to my shoulders last spring.” He just shrugged, scrabbling to pick up markers, and said “My mom says I ate three extra peanut butter sandwiches every day this summer. Had to buy new pants twice.”
A month before that, I chaperoned our fall dance. I’m 5’6”, which is average for an adult woman, and that used to mean I towered over almost all my 7th graders. Halfway through the night, I realized I was looking most 7th grade boys in the eye, and half the girls had to tilt their heads down to talk to me by the punch bowl. That never would’ve happened 10 years ago. When I started here, the tallest 7th grader in any grade topped out around 5’8”, and most were half a foot shorter than the average adult teacher.
I keep a little notebook in my desk where I jot down beginning-of-year height checks the nurse sends over, just for reference when I’m arranging seating. Pulling it out last week, I ran through the numbers. Ten years ago, the average 7th grade boy at our school was 5’2”. This year, it’s 5’5”. Girls have shifted too, from an average of 5’1” to 5’4”. It’s a small enough shift that you don’t notice it year over year, but after a decade, it’s impossible to miss.
Pediatricians talk about this as a long-term trend, rooted in better prenatal nutrition and childhood healthcare, though it’s leveled off a lot in recent decades in most places. I’m not a doctor, so I don’t dig too deep into the causes. What I do care about, as a teacher and an aunt to an 11-year-old who just outgrew all her winter coats, is the little problems this shift creates that no one really talks about.
The first issue is furniture. Schools buy desks based on size guidelines that haven’t updated in 30 years. Most standard middle school desks leave the knees of any kid over 5’6” crammed against the crossbar, so they end up sitting sideways or leaning forward all class, which gives them back aches and makes it hard to take notes. I got sick of hearing kids complain a few years back, so I made a deal with the high school teachers down the hall: I swap their extra small desks for our unused large ones. Any kid who says their knees hurt gets a bigger desk that day. For parents setting up homework spaces at home, that translates to a simple trick: don’t buy a desk labeled “for middle schoolers.” Measure your kid’s inseam when they’re sitting down, make sure when their back is against the chair, their knees don’t hit the front of the desk, and their feet lie flat on the floor. It takes two minutes, and saves months of fidgeting and bad posture. For families struggling with the constant cost of new clothes and shoes, I always recommend joining a local parent swap group for big kids’ clothing. Most tall kids grow out of items before they wear out, and you can pick up barely worn jeans and sneakers for a few dollars, if not free.
The bigger issue, though, is the social awkwardness that comes with growing faster than all your peers. I had a 7th grade girl named Mia last year who hit 5’11” when she was 12. She slouched so much through the first semester that she started getting weekly headaches from neck tension. When I pulled her aside after class to ask what was going on, she said “Everyone looks at me when I walk down the hall. I just want to be the same size as everyone else.” What helped wasn’t just telling her “being tall is great.” Her mom got her a thin, flexible posture corrector that fits under hoodies and sweatshirts, so she could work on standing straight without it being noticeable to her friends. As a teacher, I stopped lining kids up by height for assemblies and field trips years ago. Now I just pull names out of a cup for line order. That means the tallest kids don’t always get stuck in the very back, and they don’t get singled out as the “big kids” every time we leave the room. For parents, a small thing you can do is stop commenting on your kid’s height in front of other people. Even positive comments like “wow, you’re so tall!” can make an early middle schooler feel out of place. If you have to mention it, keep it private.
The other big unspoken issue is that people treat tall middle schoolers like they’re older than they are. I saw this last year with Jake: he’s 6’2” at 12, so when he accidentally knocked over the admin office’s decorative vase during a fire drill, the assistant principal initially wanted to give him detention, because “a boy that size should know to watch where he’s going.” A 4’10” 7th grader did the exact same thing three years ago, and everyone just laughed and helped him clean it up. I’ve started reminding other adults in the building, and I tell parents to do the same: when you’re talking to a coach or a teacher or even a stranger, if they comment on how big your kid is, just say “He’s still 12. He’s still figuring it out.” That sets the expectation right away that they don’t need to act more mature just because they’re bigger.
This week, Jake’s been sitting in his new big desk, legs stretched out under him, no more fidgeting every five minutes. Mia, who’s in my class this year, bought a pair of platform sneakers last weekend and came in showing them off, standing up straight to show how they look. I still have days where I misjudge everything: I’ll hold a worksheet out at my normal height, and a kid has to bend down to grab it, or I’ll reach for a supply on the top shelf of my closet and a kid will beat me to it before I even think about it. It’s one of those quiet changes that you don’t read about in parent manuals or teacher training. It just is what it is: kids are a little bigger these days, so we adjust a little, one desk swap and one line order at a time.
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