[X] Ask Sakura for help in Math and History in return for helping her improve her Taijutsu and Kawarimi in order for her to show up Ino. Help Ino with her math and other academically weaker areas in exchange for assistance with Shurikenjutsu. Keep them separate by keeping the seat between them, while also having Jabari and Yui keep the other occupied when you're not with them by having some training of his own (the guy needs to step up if he wants to pass anyway!). Maybe Jabari could get them to help with improve combat analyses? Yui could certainly whisk these young ladies away for proper teaching in substitution! Once you're sure they're good enough, get all three of you working together, with any fighting being met and dealt with personally by you.
[X] Realize the problem is much more related to self-esteem than it is anything else. Show people being bad at something doesn't mean they're worthless, and they can help others. Explain this to your friends when you get together and then ask Sakura to tutor everyone in academics.