This goes for all state schools, not just secondary.
All schools would be non-denominational and there would not be religious education at school. This should be a personal choice for parents and pupils outside of mainstream, state education. This would help get rid of the current system where church funded schools get more money or who have parents who are more engaged etc. All children would go to their nearest state school, as the quality of education would be the same.
All pupils would cover the following mandatory topics throughout their education in age appropriate ways:
Critical thinking
Personal and household financial planning
Nutrition and health, proper practical instruction in cooking, meal prep and personal exercise and a basic understanding of the body and how to keep it healthy and when to seek medical advice
Sex education and family planning
Basic DIY, household, car and bike maintenance
Basic gardening and grow your own vegetables from pots to plots
Class size would be maximum of 20
Better additional needs provision with more support in each school, without the horrendous IEP, ECHP, statement, and desperate begging of the local authority process that goes on at the moment, resulting in help that is too late and needs a lawyer or a full-time campaigner to access and retain.
As we have a desperate shortage of skilled workers, I would be looking at gearing education towards encouraging those pathways, promoting good quality apprenticeships as the next step after education.