Moving from childhood to teenage years is tricky for the whole family! Puberty is a time for rapid growth and also when any potential growth disorders may become more obvious. Are they shorter than classmates, wearing out clothes before outgrowing them, being teased about their height, mistaken for being much younger, are they shorter than you/your other children at the same age? At this age they may be more independent as such, understanding and sensitivity around the subject of height can really help.
As a reference, it is estimated that around 80% of a child’s growth will occur before puberty. During puberty, there is a rapid period of growth called the pubertal growth spurt, which is when adult height should finally be reached. For girls, puberty usually starts at around 11 years old; and for boys, puberty starts at about 13 years old.