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19:Tdcf,初めまして。rockyyyと申します。
青チャートで基礎を固めるという勉強法はとてもいいと思います！青チャートをとりあえず基礎問題から一周して、応用問題に取り組むと良いと思います。そして、自分に基礎問題を解くような力はついたなと感じる事ができたら、次の参考書に取り組むと良いと思います。

ただ、まだせあさんは高校一年生なので、そこまで急ぐ必要はないと思います。とりあえず自分が習った範囲の基礎固めを継続的に青チャートでしていくといったことをしていけばいいです。そこで余裕があれば応用問題も解いていくといったことをしていけば　大丈夫だと思います。学校で習った範囲を日々完璧にしていけば、後々の高校三年生の時にすごく楽になります。なので日々の授業の復習を大事にしましょう！そこで余裕があれば、次の分野の予習などに取り組むと良いと思います。

また、数学に対して苦手意識を持っているとのことなので、僕のおすすめの勉強法を記しておきます。数学を学ぶ手順としては次のようにすると良いと思います。

①問題を解くための基礎事項を教科書を見て学んでおく。
②その分野の基礎問題を解いてみて、解答をまるつけする。
③間違えた問題の解説をよく読んで完璧に理解する。理解できないところがあったら先生に聞いたりして必ず理解するようにする。
④これを一通り終えたら応用問題にいく

このような感じです。特に③で解説を見る時に当たって意識して欲しいことは、解説ではなぜこのような操作をしているのかということを考えることです。つまり式変形の仕方などで「なぜこのような操作をしているのか」「これをしてなんの得があるのか」と言うことを考えましょう。これが数学を学習するにあたって一番大事なことなので、実践してみてください！そして自分がそれを考えて理解した時、その理解した内容を自分の言葉でノートに書いておくと良いと思います。あとでそのノートを見返したりするとより理解が深まります。

数学の勉強法については以上になります。次に僕が次の参考書としてお勧めを挙げます。
僕が提案するのは、

河合塾の文系の数学　重要事項完全習得編
駿台の国公立標準問題集CanPass

などです。特に河合の方は解説が丁寧なことで有名なので、一度やってみると良いと思います。しかしこれらに手を出すのはまだ早いです。しっかり青チャートや学校の授業で基礎を固めてから取り組むと良いと思います。

最後に模試で確実に基礎問題を解けるようになるためにはと言うことですが、僕は他の模試の問題や実践的な問題(青チャートの応用でも良さそうな気はする)をあらかじめ解いておいて、模試の問題に慣れておくことがいいと思います。そうすると模試で取れる問題と取れない問題の区別もついてくると思うのでやってみてください。

以上になります。よければ参考にしてください！応援しています！！1b:T10cb,りぃさん、こんにちは。

数学の基礎を固めたいとのことですが、まずは学校で配られるような問題集(4ステップなど)から始めていくのが良いと思います。

学校で配られるようなもの以外でしたら、青チャートや一対一などをお勧めします。この2択ですと比較的基礎から始めてくれるのが青チャートで、基礎的な理解を前提として演習形式で進めていけるのが一対一になります。

このレベルが難しいと感じるなら黄チャートやそれに近いレベルの参考書を用いると良いと思います。

りぃさんのおっしゃられる数学偏差値50が駿台模試での話なら青チャートか一対一、それ以外の模試での話なら学校の問題集か、チャート式で基礎的なところの復習から始めると良いと思います。

チャート式は広い範囲、多くの開放を網羅的に学習することができますが、その分重要度の低い問題も多いため運動部で時間がない場合は少し厳しい面もあります。

また、一対一は数学Ⅰで一冊など合計6冊に分かれて出版されているため、得意な分野のみ使用するなどしても良いかもしれません。

運動部で時間がないとのことですし、個人的には4ステップなどの学校で配られる問題集を一通りすすめ(余裕があるなら2.3周したいところ)
次に一対一で演習をすればある程度基本は固まると思います。

逆にチャート式は時間のかかる問題集ですので数学に多くの時間を割く覚悟がないのでしたらおすすめはしません。

私が使っていたものとしては以上のとおりですが、他にも良い参考書は色々とあるので近い難易度のものから自分のやり方に合ったものを探してみると良いでしょう。

進め方としては他の分野に関わりの少ない場合の数、確率、整数、データの分析などは一度飛ばして、数Ⅲなどの前提となる二次関数、図形と方程式、三角関数などから進めていくことをお勧めします。

もちろん場合の数なども重要ではあるのですがある程度独立した単元ですので後から追いつきやすいため、一旦後回しにしても問題ないと考えられます。

やり方ですが、このレベルの問題集を進める際には厳密な時間制限は必要ないと思います。ただしすぐに答えを見てしまうと印象に残りづらいですし、時間をかけすぎても非効率なので、最低5分は考え、手が止まってしまった場合は15分程度で諦めると良いと思います。もちろん解き始めてから15分経過した時点で手が動いているなら続行して構いません。

解答を見る際にはなぜ間違えたのかしっかり考えるようにしましょう。ケアレスミスであってもどこでミスをしてしまったかはハッキリさせるようにしましょう。

途中で手が止まってしまったり、そもそも何もできなかった場合は、最低限何が出来れば次のステップに進めたのかは分析するようにすると良いと思います。

効率的な勉強をお望みのようですし、忙しく時間も取りづらいようですので分析の時間を長く取らなくてもかまわないと思います。場合によっては今はまだ理解できないと判断して飛ばしてしまうのも手だと思います。

しかし、問題集を解くのは一周では足りない場合が多いと思いますので、2週目以降は重要度の高い問題や間違えた問題に絞ってもよいのでなるべく複数回解くようにしましょう。

長くなりましたが、私の考えは以上になります。

京都大学を目指すにあたって偏差値50というのは心許ない数字ではあります。(駿台模試の成績だったとしても)しかし、りぃさんはまだ高二ですし、伸び代はあると思います。努力が報われることを祈っています。応援しています。1c:Td43,勉強お疲れ様です！

数学の勉強法ですね。
青チャートは非常に優れた参考書なのでやりこむのは大変良いことだと思いますが、質問者さんのような成績であれば、もう少し簡単めな参考書を先にやることが重要だと思います。
実際、私も数学の偏差値は進研模試でも40台からのスタートだったので、かなり参考になるかなと思います。



初めに、数学は学校の授業が非常に重要です。理系は理系科目と同等レベルで、文系であれば最も重要な授業科目と言っても過言ではありません。

毎日の授業で恐らく進むであろう進度まで毎回予習はしているでしょうか？
それを怠っているのであれば、それが最優先事項です。
毎回の授業では、予習の段階で自分が理解していなかった解法や考え方を集中して聞くことが重要です。その繰り返しが数学の授業なので、前もって自分が何が分かっていないのかを理解しておくようにしましょう。それが分かっているのであれば、30～1時間も時間をかける必要はありません。

次に、授業が終わった後から教科書の問題と学校指定のワーク（進んだ範囲の初級・中級問題）を扱いましょう。反復をして、記憶の定着化を図ります、

テスト期間に入れば、学校指定ワークの中級～上級問題を行います。遅れを取っている状況であれば、初級から初めても構いません。大事なのは自分の力を過信せず、自分の力に見合ったレベルの問題を行うことです。（私は4プロセスが学校指定のワークでした。）また、青チャートの☆1～3、余裕があれば4～5に触れましょう。


以上が普段の数学の勉強の流れです。
これが出来ていなければ、まずこれを定着しましょう。


また、質問者さんが言っている「1つの単元の内容を忘れてしまう」のは私もしょっちゅうでした。恐らく、それこそ東大志望者であっても（忘れた程度は問わず）内容を忘れてしまうものです。

大切なのは、学校で習った時にしっかりと1度定着をさせることです。

そうすることで、仮に1度すべて忘れてしまっても、受験期や長期休みの間に復習を始めればすぐに思い出せます、やはり、1度インプットすることは他の暗記教科と同様、重要なようです。

今の遅れを取り戻したいのであれば、まずは学校の授業を大切にしましょう
そして、時間があればまた教科書や学校指定のワーク、青チャートであれば☆1～2から触れ、一気に行うのでは無く、毎日少しずつやることで記憶の定着化を図りましょう。


私は上記の内容を意識しだした結果、進研模試偏差値40台から60台、共通テストでは数学1A・2B共に8割越え、二次試験も6割近くとれました。元々数弱としてクラスや同級生の間でキャラ付けされていた僕ですらこのような成績まで上げることが出来ました。

まだまだ時間はたくさんあります！頑張ってください！
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items-center py-4","children":[["$","div",null,{"className":"flex-1","children":[["$","div",null,{"className":"mb-1","children":"文系数学で高2のうちにやっておくべきこと"}],["$","div",null,{"className":"text-xs text-caption line-clamp-2 mb-1","children":"私も青チャートを使っていました！\n基本的に、高2だろうと高3だろうと勉強法は変わりません。\n青チャートが解ければ、他の問題は怖くありません。\n\n以下、勉強の極意です。\n\n1.まずは一通り例題を解き、公式の使いどころを覚える。（基本問題）\n→数学には解法パターンがあります。こういう問題が来たら、こういう方法で解く、というのが反射的にわかる、身につく、というところまでもっていきます。\nこの時、公式がわからない、理解できないときは教科書を開いて理解するようにしましょう。\n\n2.例題の下にある問題を解く（標準問題）\n→わからなくてもすぐに答えなどみずに、10分は考えるようにしましょう。この時色々な公式や解法が頭に浮かべば、知識は身についている証拠です。\n逆に標準問題で手も足も出ないなら、教科書に立ち返りましょう。\nここまでできれば、定期テストや模試である程度の得点は見込めます。（青チャートなら国立大やマーチレベル）\n\n3.章末問題を解く（応用、発展問題）\n→数学を得点源にしたい人、難関国立大や早慶を狙う人は最終的に解けるようにしましょう。\nこのレベルだとさまざまな公式を合わせて使う、複合タイプの問題になります。\nこの問題をやるときは、「自分がどこまでわかっていて、どこからがわからないのか」をしっかり把握するようにしてください。復習するときはできないところの例題などを見返し、できるようにしましょう。\nこれが解ければ模試の大問もほぼ完投できます。\n\n\nこのように、大事なことはとにかく、\n理論を理解する\nことです。\n闇雲にやって量をこなすのではなく、丁寧に時間をかけて勉強してください。\n"}],["$","div",null,{"className":"flex 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items-center py-4","children":[["$","div",null,{"className":"flex-1","children":[["$","div",null,{"className":"mb-1","children":"初見の問題が解けない"}],["$","div",null,{"className":"text-xs text-caption line-clamp-2 mb-1","children":"初見の問題が解けるようになるための\n数学の参考書と勉強法について紹介します！\n\nまず、初見の問題について\nこれを2つに分類します。\n\n① 基本問題だが自分にとっては初見の問題\n② 応用問題で多くの人にとって初見の問題\n\nまず、①について\n基本問題の演習を繰り返し、\n基礎固めをしてください。\n具体的な方法は下に書いておきます！\n\n次に、②について\n応用問題は基本問題の組み合わせです！\nなので、身についた基礎をどの場面でどう使うか考える練習をしましょう！\nこれも具体的な方法を下に書きますね。\n\n上の①②に対応する\n数学の『オススメ教材』と『オススメ勉強法』について紹介します。\n\nまず、①の基本問題に関する『オススメ教材』ですが\n全範囲を満遍なくカバーし、\n数学の基礎力向上に最適な教材として\n・青チャート1A2B\nをオススメします！\n\n解答解説がしっかりしていて、\n問題を解くときの考え方まで紹介しているので、\n基礎固めはこの教材を何周もすれば十分です！\n\n基礎問題がしっかりできていれば、\n全国の受験生が受ける模試であれば\n偏差値60〜65程度は到達可能です。\n\n加えて、青チャートを完璧にすると\n模試の時にどれが基本問題でどれが応用問題かわかるようになりますよ！\n\n次に、青チャートが終わったならば\n今度は身についた基礎を使う練習\nつまり、応用問題を解くために基礎をどの場面でどう使うかを練習しましょう！\n\n次に②の応用問題を解く力を身につける\n演習用のオススメ教材としては以下の教材がオススメです！\n・1対1対応の数学\n・プラチカ\n・やさしい理系数学\n\n最後にに『オススメ勉強法』ですが\n青チャートを使うかどうかに関わらず、\n問題の考え方や解答を理解した後に解答を見ずに\n最初から最後まで自力で再現してみることが大切です。\n\nここで、再現できないようであれば、\nまだまだ理解が足りてないということです。\n\nつまり、\n問題を解く\n↓\n考え方と解説を理解する\n↓\n解答を見ずに、自力で再度解く\n\nこの3つのことを繰り返すことで飛躍的に数学力が上がります！\n\nぜひ、実践してみてください！\nやり方を忘れた時に見返してくれたら幸いです。"}],["$","div",null,{"className":"flex 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items-center py-4","children":[["$","div",null,{"className":"flex-1","children":[["$","div",null,{"className":"mb-1","children":"早く数学の基礎を完成させたいです🙏"}],["$","div",null,{"className":"text-xs text-caption line-clamp-2 mb-1","children":"まず自分の置かれている状況を客観的に把握できていらっしゃる点を評価したい。私の周りで第1志望校に合格できなかった人の多くは自分の現状をしっかり把握できていなかったと思う。\nまず基礎を固めるためには教科書→教科書汎用問題集→青チャートの順が良いと思う。そもそもの土台ができていないことには応用問題に手がつけられないと思う。学校の進度が遅いなら、自分で先取り学習するのも手だと思う。\n実際に私は朝起きて数学を勉強していた。朝解くものは教科書汎用問題集であった。計算力を高めたり、頭が冴えるように上記のレベルの問題を解いていた。\nたしかに、難関大を目指すならばそれ相応の時期から対策をする必要はあるが、それ以上にどれだけ集中して目の前の課題をこなせるかの方が大事だと思う。\n最後に再喝する形にはなるが、何事にも基礎は大切だと思う。どうしても応用問題に手を出したくなるが、その気持ちをこらえてまずはしっかり土台づくりすることが肝要であると思う。ぜひ頑張ってください！"}],["$","div",null,{"className":"flex mb-1","children":[["$","svg",null,{"stroke":"currentColor","fill":"currentColor","strokeWidth":"0","viewBox":"0 0 24 24","className":"text-subPrimary mr-1","children":["$undefined",[["$","path","0",{"fill":"none","d":"M0 0h24v24H0V0z","children":[]}],["$","path","1",{"d":"M12 6c1.1 0 2 .9 2 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