이차함수
a·b·c 슬라이더 (★★ 파일럿)
단원 세부 학습자료
이차함수에서 변하는 양과 변하지 않는 규칙은 무엇일까?
3분 훑어보기
이차함수 is a 수학 unit in 변화와 관계. In this unit, the student looks for quantity, relation, representation, and justification. The first pass is deliberately simple: identify the situation, point to the one part that changes, and say what stays stable. a·b·c 슬라이더 (★★ 파일럿) is used as a small laboratory, so the learner can touch the idea before writing it as a rule. Start with a concrete case, then name the general idea after the pattern is visible.
Choose one visible part of the 변화와 관계 situation and decide whether it is an input, a condition, a source clue, or a result.
Take the first observation from 이차함수 and express it in a second form: sentence, table, diagram, map note, timeline note, or symbolic statement.
표준 · 심화 설명
이차함수 becomes reliable when the learner can move between a source-backed curriculum term and a visible action. The working routine is to change one value and compare the table, expression, graph, or diagram before naming the rule. After each change, the student records what was expected, what actually happened, and which clue supports the explanation. This makes the unit more than a title in the index: it becomes a repeatable reasoning pattern for 변화와 관계.
A stronger explanation of 이차함수 connects the unit to later learning. The student should be able to state the controlling condition, describe the result with precise language, and justify the claim with use a worked value, a visual representation, and one sentence of reasoning together. When the same idea appears in a different problem, the learner transfers the structure rather than memorizing the surface example. That transfer is the acceptance target for M9-CR-03.
예시
Choose one visible part of the 변화와 관계 situation and decide whether it is an input, a condition, a source clue, or a result.
Use a·b·c 슬라이더 (★★ 파일럿) to change only that part. Keep the rest of the situation fixed, then compare the before and after states. Record the comparison with the unit ID M9-CR-03 so the explanation stays tied to this verified unit.
The point is not speed. The point is to make one controlled change and explain it with quantity, relation, representation, and justification.
Take the first observation from 이차함수 and express it in a second form: sentence, table, diagram, map note, timeline note, or symbolic statement.
Check whether the second form preserves the same relationship. If the meaning changes, mark the exact word, number, position, or condition that caused the shift.
이차함수 is learned deeply when the same idea can survive a change of representation.
Pick a case that is smaller, larger, earlier, later, more formal, or more exceptional than the first example.
Predict the result before using the interactive surface. Then compare the prediction with the displayed result and revise the explanation in one clear sentence.
A boundary case shows whether the learner understands 변화와 관계 structure or is only copying the first example.
미니 문제
- 1개념 확인
In 이차함수, what must be separated before the learner writes the final rule or interpretation?
- 2적용 문제
When using a·b·c 슬라이더 (★★ 파일럿), what should the learner record after changing one control or choice?
- 3실수 교정 · 전이
A learner gives an answer for 이차함수 but cannot point to evidence. What is the best correction?
정답과 해설
This separation prevents guessing. It also matches the 수학 reasoning focus of quantity, relation, representation, and justification.
The record turns an interactive action into evidence. Without it, 이차함수 becomes clicking rather than learning.
The correction transfers the unit from memory to reasoning. It asks the learner to use use a worked value, a visual representation, and one sentence of reasoning together instead of relying on surface recall.
흔한 실수
Ask what changes, what stays fixed, and what evidence proves the result. This directly addresses the common error of jumping straight to a formula before deciding which quantity changes.
Change one condition, record the result, and only then compare a second condition. This keeps the cause-and-effect chain visible.
실생활 적용
이차함수 helps students handle planning, measurement, money, data, or repeated patterns. The learner should name the situation, identify the evidence, and explain how the 변화와 관계 idea changes the decision.
A student can use this unit during peer explanation by saying: "I changed this one part, I observed this result, and this evidence supports my answer." That sentence format works across later 수학 units.
다음 단원
출처
- Repository master unit index · docs/00-MASTER-INDEX.md · M9-CR-03 row in docs/00-MASTER-INDEX.md
- NCIC 2022 revised national curriculum resources · https://www.ncic.re.kr/ · 수학 grade 9 변화와 관계 curriculum structure
- Local achievement-standard metadata · lib/curriculum/overrides.ts · M9-CR-03 achievementStandards field
학습 경로 미리보기
조작 영역
a·b·c 슬라이더 (★★ 파일럿)
선수 학습
- M8-CR-04
- M9-CR-01
성취기준: [9수03-08] (NCIC 2022 개정)