Is Goblins free for teachers?

Yes. Goblins offers a generous free tier that includes 1 live feedback assignment per week, insights on student mastery and replays, and the ability to upload your own content. The Max plan adds unlimited assignments, superadaptive mode, grade exports, standards growth reports, and SSO/LMS integration, with per-student pricing for schools and districts.

How does Goblins work?

Three simple steps: (1) Share an assignment from thousands of standards-aligned topics using a share code. (2) Students speak and draw their thinking naturally, and Goblins responds with Socratic questioning that sounds just like their teacher. (3) Teachers get real-time formative insights showing what students struggle with and suggestions to inform instruction.

Does Goblins prevent cheating?

Yes. Goblins uses a purpose-trained AI model that evaluates cheating signals in real time. It can detect when students are copying answers, using external tools inappropriately, or not genuinely working through problems. Copy-pasting answers is also blocked.

Can I use my own voice with Goblins?

Yes. Teachers can record their voice and take a selfie to create a custom 3D avatar in about 30 seconds. Students then hear help in their own teacher's voice and see a familiar face, making the experience more personal and effective.

What math levels does Goblins cover?

Goblins covers math from Grade 5 through AP Calculus, including thousands of standards-aligned topics. Teachers can also upload their own content for custom assignments at any level.

Is Goblins FERPA compliant?

Yes. Goblins is FERPA and state compliant. Student data privacy and security are a top priority.

Does Goblins support English Language Learners?

Yes. Goblins supports 30+ languages so teachers don't have to translate every worksheet. It is especially helpful for ELL students who need accessible math instruction in their native language.

What grade level is NC.M3 taught?

This standard is part of the NC curriculum in North Carolina Standard Course of Study - Mathematics.

NC.M3: Math 3

Math 3

Print

Math 3 extends algebraic and function work to polynomial, rational, and trigonometric models, with students interpreting, building, and transforming a wider family of functions. Geometric content focuses on congruence, proof, circles, and modeling with geometry, supported by coordinate methods. Statistics centers on inference: using sample data to draw and justify conclusions about populations.

NC.M3.A-APRAlgebra: Arithmetic with Polynomial and Rational Expressions NC.M3.A-CEDAlgebra: Creating Equations NC.M3.A-REIAlgebra: Reasoning with Equations and Inequalities NC.M3.A-SSEAlgebra: Seeing Structure in Expressions NC.M3.F-BFFunctions: Building Functions NC.M3.F-IFFunctions: Interpreting Functions NC.M3.F-LEFunctions: Linear, Quadratic, and Exponential Models NC.M3.F-TFFunctions: Trigonometric Functions NC.M3.G-CGeometry: Circles NC.M3.G-COGeometry: Congruence NC.M3.G-GMDGeometry: Geometric Measurement & Dimension NC.M3.G-GPEGeometry: Expressing Geometric Properties with Equations NC.M3.G-MGGeometry: Modeling with Geometry NC.M3.N-CNNumber and Quantity: The Complex Number System NC.M3.S-ICStatistics and Probability: Making Inference and Justifying Conclusions

Example Problems

Consider the following rational division:

\frac{x^2 - 9}{x + 2} \div \frac{x^2 + 5x + 6}{x - 3}

What is the quotient in lowest terms?

It takes 12 hours and $250 to paint a single-family home, and it takes 80 hours and $600 to paint a commercial building.

A painting company has less than $70000 to paint these properties, and it wants to spend at most 900 hours to do so.

Let

x

denote the number of single-family homes they paint and

m

the number of commercial buildings they paint.

Write a system of inequalities that represents the following conditions:
1. An inequality that represents the condition based on the number of dollars the company can spend.
2. An inequality that represents the condition based on the number of hours the company wants to spend.

Solve for x:

\frac{4x}{x + 1} = 2

Is the expression

\\frac{2^x \\cdot 4^x}{8^x}

equivalent to 1?

What is the inverse of the function?

f(x) = 8x + 1

1-on-1 AI tutoring aligned to NC.M3. Instant help for students, real-time insights for teachers.

Used in classrooms by 100,000+ students at Baltimore County, Plano ISD, Deer Valley USD, KIPP, and districts nationwide.

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