15 year old wanting to help siblings with education.

Hello there! I’m the oldest of my siblings, 15 to be exact. And the past school year has been interesting. My mom has been doing school for a new job, my dad gone apart from the weekends. And it’s hard getting my little siblings the education they need since my moms busy and so is my dad. So I was wondering, do any of you have anything that I could do when it comes to teaching them? Youngest in 2nd and middle in 5th, while myself am in 10th. I wanna be there to help teach them when my parents can’t. So like I said before. does anyone have stuff I could use to help them learn? Anything helps!