There used to be an empty chair at the back of Mrs. Khan's classroom, but on the third Tuesday of the school year a new kid fills it: nine-year-old Ahmet, a Syrian refugee. The whole class is curious about this new boy - he doesn't seem to smile, and he doesn't talk much. But after learning that Ahmet fled a very real war and was separated from his family along the way, a determined group of his classmates bands together to concoct the greatest idea in the world - a magnificent plan to reunite Ahmet with his loved ones.

One year after a random shooting changed their family forever, Nora and her father are exploring a slot canyon deep in the Arizona desert, hoping it will help them find peace. Nora longs for things to go back to normal, like they were when her mother was still alive, while her father keeps them isolated in fear of other people. But when they reach the bottom of the canyon, the unthinkable happens: A flash flood rips across their path, sweeping away Nora's father and all of their supplies.

Ever since Ellie wore a whale swimsuit and made a big splash at her fifth-birthday party, she's been bullied about her weight. To cope, she tries to live by the Fat Girl Rules - like "no making waves", "avoid eating in public", and "don't move so fast that your body jiggles". And she's found her safe space - her swimming pool - where she feels weightless in a fat-obsessed world. In the water, she can stretch herself out like a starfish and take up all the room she wants. It's also where she can get away from her mom, who thinks criticizing Ellie's weight will motivate her to diet.

San Francisco and Orangevale may be in the same state, but for Héctor Muñoz, they might as well be a million miles apart. Back home, being gay didn’t mean feeling different. At Héctor’s new school, he couldn’t feel more alone.

Twelve-year-old Ana wants nothing more than to escape the future set for her and her classmates in her small mining village. Boys her age are beginning to leave school to become silver miners and girls her age are destined to one day be the wives of miners. But when her often ill 11-year-old brother is forced by their demanding father to start work in the mines, Ana gives up her dreams of school to volunteer in his place. The world of silver mining though is dark and dangerous and the men who work there don't want a girl in their way.

Ever since Stella was a puppy, she was trained to use her powerful beagle nose to sniff out chemicals used in explosives and warn her human handler in order to keep people safe. But during a routine security inspection, Stella is distracted and misses the scent of an explosive chemical. The sound of the blast is loud and scary. Stella survives, but her handler is gone. Stella blames herself, certain she’s a bad dog. Scared of loud noises, especially thunder and fireworks, Stella struggles with her anxiety and must be retired from being a service animal.

Melody is not like most people. She cannot walk or talk, but she has a photographic memory; she can remember every detail of everything she has ever experienced. She is smarter than most of the adults who try to diagnose her and smarter than her classmates in her integrated classroom - the very same classmates who dismiss her as mentally challenged because she cannot tell them otherwise. But Melody refuses to be defined by cerebral palsy.

Clea can’t control her thoughts. She knows she has to do her homework...but she gets distracted. She knows she can’t just say whatever thought comes into her head...but sometimes she can’t help herself. She know she needs to focus...but how can she do that when the people around her are always chewing gum loudly or making other annoying noises? It’s starting to be a problem - not just in school, but when Clea’s playing chess or just hanging out with her best friend.

Ally has been smart enough to fool a lot of smart people. Every time she lands in a new school, she is able to hide her inability to read by creating clever yet disruptive distractions. She is afraid to ask for help; after all, how can you cure dumb? However, her newest teacher Mr. Daniels sees the bright, creative kid underneath the trouble maker. With his help, Ally learns not to be so hard on herself and that dyslexia is nothing to be ashamed of.

When ten-year-old Lina Gao steps off the plane in Los Angeles, it’s her first time in America and the first time seeing her parents and her little sister in five years! She’s been waiting for this moment every day while she lived with her grandmother in Beijing, getting teased by kids at school who called her “left behind girl.” Finally, her parents are ready for her to join their fabulous life in America! Except, it’s not exactly like in the postcards.

From fixing the class computer to repairing old radios, 12-year-old Iris is a tech genius. But she's the only deaf person in her school, so people often treat her like she's not very smart. If you've ever felt like no one was listening to you, then you know how hard that can be. When she learns about Blue 55, a real whale who is unable to speak to other whales, Iris understands how he must feel. Then she has an idea: She should invent a way to "sing" to him! But he's 3,000 miles away. How will she play her song for him?

Eleven-year-old Kemi Carter loves scientific facts, specifically probability. It's how she understands the world and her place in it. Kemi knows her odds of being born were 1 in 5.5 trillion, and that the odds of her having the best family ever were even lower. Yet somehow, Kemi lucked out. But everything Kemi thought she knew changes when she sees an asteroid hover in the sky, casting a purple haze over her world. Amplus-68 has an 84.7% chance of colliding with earth in four days, and with that collision, Kemi’s life as she knows it will end.

At night, in Huda's fragrant garden, a breeze sweeps in from the desert encircling Baghdad, rustling the leaves of her apricot trees and carrying warning of visitors at her gate. Huda, a secretary at the Australian embassy, lives in fear of the Mukhabarat - the secret police who watch and listen for any scrap of information that can be used against America and its allies. They have ordered her to befriend Ally Wilson, the deputy ambassador's wife. Huda has no wish to be an informant, but fears for her teenage son, who may be forced to join a deadly militia.

Starting at a new school is scary, especially with a giant hearing aid strapped to your chest! At her old school, everyone in Cece’s class was deaf. Here, she’s different. She’s sure the kids are staring at the Phonic Ear, the powerful aid that will help her hear her teacher. Too bad it also seems certain to repel potential friends.

Ana Dakkar is a freshman at Harding-Pencroft Academy, a five-year high school that graduates the best marine scientists, naval warriors, navigators, and underwater explorers in the world. Ana's parents died while on a scientific expedition two years ago, and the only family's she's got left is her older brother, Dev, also a student at HP. Ana's freshman year culminates with the class' weekend trial at sea, the details of which have been kept secret. She only hopes she has what it'll take to succeed.