Question

My apologies for turning it in late. Because of it all deleting/not saving I worked on it throughout the school day and after school practice I finished it.
make this more proper

Answer 1

Here are a few polished versions you can use, depending on how formal you want to be:

1) Formal
My apologies for the late submission. I experienced a technical issue that erased my work, so I had to redo it. I worked on it throughout the school day and after practice, and have now completed it.

2) Concise
I’m sorry for turning this in late. My work was lost due to a saving error, so I redid it during the school day and after practice and have now finished it.

3) Email-style (polite + brief explanation)
Hello [Teacher’s Name],
I apologize for the late submission. A technical problem caused my original work to be deleted, so I spent the school day and after-practice recreating it and have now completed the assignment. Thank you for your understanding.

Want one tailored to a specific teacher or tone?