More teachers per student.

Starting at about 4 student per teacher, and each year or developmental step gets a few more students. If still doing grades/years then another 2 or 3 students per. This let's each teacher learn about each student and actually catch any development hurdles early and give the children direct attention. As children grow they get to learn to socialize more and more in bigger groups.

Gamification and goal adjustment

They shouldn't have letter grades anymore, or if they do they aren't locked at percentages. That means the grade can only go down as they make mistakes. Instead they start at the bottom and have to answer so many questions correctly to prove understanding. They also don't run out of questions. When they get something wrong an explanation is given as to why and even steps on how to understand and work through it. When they understand a topic they move on and more questions on the things they struggle with are given. All of this is underpinned with game things like achievements, and unlocks, and rewards and so on.

Focus on practicality, strengths, and real world mentorship

After learning the fundamentals, more education should focus on their strengths, wants, and practical application. Actually doing the things is so important so getting out there and witnessing it, doing it in person is important. So there should be mentors like olden times. Students get to shadow people long term, actually do what they do, learn with them, earn with them. Multiple opportunities should be given that students find what they do enjoy, what they do excel at even if those things are different. This gives the student early indicators and choices. No longer needing to determine what they wanna be when they grow up without any real world experience.

No standardized testing, overhaul of how each subject is taught

Maths is amazing. Glorious puzzles to be solved. It's currently taught in the worst way imaginable and sucks all the fun out of the subject. Now the majority of people hate maths. This is the same for quite a few subjects. A lot of that is due to standardized testing or how it's taught. Those tests should disappear. Testing, just like grading above, would be catered to the student. Students still need to achieve reasonable real world goals, but timed stadardized testing in a high stress environment isn't the way. Students would be afforded all the tools they would have access to in the real world. They would be taught how to use those tools effectively instead of told to memorize. They would be afforded a chance to enjoy they education and proof their worth in the way that works for everyone including themselves and not just to a random committee that made up an arbitrary system ages ago.

There is more but I'll stop here.