Although Adams doesn't talk explicitly about developmental levels when discussing phonemic segmentation, she does when discussing phoneme manipulation; she says that phoneme manipulation tasks have generally been found to be beyond the reach of children before the very end of first grade (p. 72). (ciera.org)
Here is what you can expect your child to learn by the end of first grade. (verywellfamily.com)
But if your child is the youngest of five, you may see him or her biting at the bit at the end of first grade to head to camp. (thespruce.com)