The pressure and costs of having children out of school for long periods places a huge burden on modern working families. Increased childcare, high season holiday costs, enforced absence from work all contribute. There is no good reason for the current system and a change could help families, employers and even the Treasury. There is no reason to wait so please change it now.
As simple as it sounds-change the school year into 4 (or more) equal terms with equal breaks in between.