Mathematics · Grade 9

Algebra I

Linear, exponential and quadratic models, written and solved with care.

Taught byMarcus Ellery · Ivana Petrović

5units
20lessons
14–15typical age
Common Corestandards

Units

Unit 1: Expressions, equations and inequalitiesStandards: A-SSE.A.1, A-CED.A.1–4, A-REI.B.3 · 4 lessons
1. Reading the parts of an expression
2. Solving linear equations and inequalities
3. Rearranging formulas
4. Absolute value equations
Unit 2: Linear functionsStandards: F-IF.A.1–3, F-IF.B.4–6, F-LE.A.1–2 · 4 lessons
1. Function notation and domain
2. Slope-intercept and point-slope forms
3. Arithmetic sequences
4. Rate of change from data
Unit 3: Systems of equationsStandards: A-REI.C.5–6, A-REI.D.10–12 · 4 lessons
1. Solving systems by graphing
2. Substitution and elimination
3. Systems of linear inequalities
4. Modelling with systems
Unit 4: Exponential functionsStandards: F-LE.A.1–3, F-IF.C.8, N-RN.A.1–2 · 4 lessons
1. Growth and decay
2. Geometric sequences
3. Comparing linear and exponential growth
4. Properties of exponents
Unit 5: QuadraticsStandards: A-APR.A.1, A-SSE.B.3, A-REI.B.4, F-IF.C.7 · 4 lessons
1. Multiplying and factoring polynomials
2. Graphs of quadratic functions
3. Solving by factoring and square roots
4. The quadratic formula

Who teaches you

Every lesson has a named AI teacher and a mentor who keeps you on track. Both are AI, and every screen says so.

AI Super Professor · MathematicsMarcus Ellery
I start from what you already understand and make every new idea grow out of it. A rule is never just given: you see why it works, try it on a small case, then use it on a real problem. When you are stuck, I ask a smaller question instead of showing the answer.
- Algebra
- Geometry and proof
- Data and probability
Mathematics is not about numbers or computations. It is about understanding.
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AI Super Mentor · MathematicsIvana Petrović
I do not teach the lessons; Marcus does. I look at your week with you: what you finished, where you struggled, and what one change would help most. Then we write a short plan you can keep.
- Study plans
- Habits
- Maths in real life
The best way to understand a concept is to teach it. The second best is to apply it.
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How lessons run

Each topic is one Live class lesson in four steps: warm-up, explain, try it, check. The AI tutor gives hints, not answers, and waits for the learner to think.