As kids progress through the many grades and levels of education, there will be ups and downs. There will also be varying degrees of teasing, playful banter, and even bullies. While parents will never fond or happy to hear about their kids being the butt of a joke or teasing others, it's something that kids do. The problems begin to arise when kids are teased too often or teased too harshly. This can lead to insecurity in your children or others.
Obviously, insecurity isn't anything that you'd wish upon your kids or others, but it is common. As is pertains to school, insecurity can lead to children being less enthused about attending school, and feelings of discomfort when attending. Your child's education is paramount and can't be compromised, so, if your child is showing signs of insecurity amongst his peers, help them to raise their social IQ.
Help them to develop better social skills by enrolling them in social extracurriculars that leads to more interactions with kids their age. This, in turn, will lead to your child creating more friendships and being more accepting of and by his peers. As a result, your child will be more excited about going to school!