上達(じょうたつ)improvement (e.g. in skill, ability), advance, progress, communication of opinions of the general populace to those of high rank

英会話(えいかいわ)学校(がっこう)のおかげで英会話(えいかいわ)が上達(じょうたつ)した。

Thanks to the English conversation school, my English conversation skills have improved. {improvement (e.g. in skill, ability), advance, progress, communication of opinions of the general populace to those of high rank}

生徒(せいと)の腕(うで)が上達(じょうたつ)しているので、教(おし)えるのが楽(たの)しいです。

Teaching is enjoyable because the students' skills are improving. {improvement (e.g. in skill, ability), advance, progress, communication of opinions of the general populace to those of high rank}

なかなかスキルが上達(じょうたつ)しない生徒(せいと)を教(おし)えるのは大変(たいへん)である。

Teaching students who have difficulty improving their skills is quite challenging. {improvement (e.g. in skill, ability), advance, progress, communication of opinions of the general populace to those of high rank}

彼女(かのじょ)は大(だい)のK-POPファンとあって、韓国(かんこく)語(ご)の上達(じょうたつ)が他(ほか)の誰(だれ)よりも早(はや)い。

Being a huge K-POP fan, her improvement in Korean language is faster than anyone else's. {improvement (e.g. in skill, ability), advance, progress, communication of opinions of the general populace to those of high rank}

独(ひと)り言(ごと)：「毎日(まいにち)練習(れんしゅう)してもピアノが全然(ぜんぜん)上達(じょうたつ)しないんだから、嫌(いや)になっちゃうよ…。」

Monologue: "Even though I practice every day, my piano skills aren't improving at all... It's so discouraging..." {improvement (e.g. in skill, ability), advance, progress, communication of opinions of the general populace to those of high rank}