A Facebook page called "RIP Caroline Previdi -- Sandy Hook Massacre Victim" contains dozens of messages. One reads: "Rest in Peace, sweetheart. I know for sure that God is with you and all the other sweet little angels. I feel so very sorry for all these families who lost their precious kids, my heart goes out to all of you."

Jessica Rekos, 6

Jessica loved everything about horses -- horse movies, horse books, drawing horses and writing stories about them.

She asked Santa this year for new cowgirl boots and a cowgirl hat. Her family had promised she could get her own horse when she turned 10.

"She was a creative, beautiful little girl," her family said in a statement, describing Jessica as their "rock."

"She had an answer for everything, she didn't miss a trick, and she outsmarted us every time. We called her our little CEO for the way she carefully thought out and planned everything," they said. "We cannot imagine our life without her."

Jessica also loved orca whales and playing with her two little brothers.

"We are mourning her loss, sharing our beautiful memories we have of her, and trying to help her brother Travis understand why he can't play with his best friend," her family said.

Avielle Richman, 6

Avielle was happiest when she was on a horse.

Her trainer, Annette Sullivan, told the Connecticut Post that Avielle would "giggle when she trotted."

Like kids her age, her first loose tooth was a sign she was growing up.

"She showed me her wiggly tooth, she was so excited," Sullivan told the newspaper. "She was the most delightful little girl you ever met in your life."

Lauren Rousseau, 30

Rousseau, a permanent substitute teacher at Sandy Hook Elementary, "wanted to be a teacher from before she even went to kindergarten," her mother said in a written statement Saturday. "We will miss her terribly and will take comfort knowing that she had achieved that dream," Teresa Rousseau said.

She grew up in Danbury, Connecticut, and earned a bachelor's degree from the University of Connecticut and a master's degree in elementary education from the University of Bridgeport.

Rousseau "worked as a substitute teacher in Danbury, New Milford and Newtown before she was hired in November as a permanent substitute teacher at Sandy Hook Elementary School in Newtown," her mother said.

Mary Sherlach, 56

Sherlach, Sandy Hook Elementary's school psychologist, was with Hochsprung when they heard a "pop, pop, pop" sound around 9:30 a.m., a parent with both women at the time told CNN. Sherlach was shot to death after heading into the hall to find out what was happening.

"I ... am always ready to assist in problem-solving, intervention and prevention," Sherlach wrote on her website.