Shoujo that takes place in a school theme(づ￣ ³￣)づ

Tonari no stella
Honey lemon soda
Special A
Gakuen alice
Ore sama teacher (no romance)
Gekkan shoujo nozaki kun
Ao haru ride
Orange
Orange marmalade
Flawless

Faded first love

https://www.mangago.zone/read-manga/heroine_hajimemashita/

I've been reading This Boy in Class, it's cute but it's not completed yet (=・ω・=)
https://www.mangago.zone/read-manga/this_boy_in_class/

My favorite shoujo manga are Lovely Complex, Mekakushi no Kuni and Usotsuki Lily (which I know are popular so maybe you already know them haha)
https://www.mangago.zone/read-manga/lovely_complex/
https://www.mangago.zone/read-manga/mekakushi_no_kuni/
https://www.mangago.zone/read-manga/usotsuki_lily/

Mint na Bokura (same mangaka as Marmalade Boy) is also really fun
https://www.mangago.zone/read-manga/mint_na_bokura/

gekkan shoujo nozaki kun

School Life Pt 1
https://www.mangago.zone/home/mangalist/1408350/
School Life Pt 2
https://www.mangago.zone/home/mangalist/1759860/

Enjoy