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.

NC.M2.A-REI.1

Justify a chosen solution method and each step of the solving process for quadratic, square root and inverse variation equations using mathematical reasoning.

Example Problems

Solve the equation:

\sqrt{x + 9} + 2 = 5

Solve the equation:

\sqrt{4 - x} = x + 2

Solve the equation:

\sqrt{4x + 9} = x + 1

Khan Academy Resources

Understanding the quadratic formula Solving quadratics by completing the square Solving quadratics by factoring review Extraneous solutions of radical equations Intro to solving square-root equations Completing the square review Solving simple quadratics review Solving square-root equations Solving quadratics by taking square roots Solving quadratics by factoring Quadratic formula Rational equations intro Quadratics by factoring (intro)Completing the square (intermediate)Completing the square Quadratics by factoring Quadratics by taking square roots Square-root equations Square-root equations intro Rational equations Quadratic word problems (standard form)Interpret quadratic models Solve equations using structure Features of quadratic functions Extraneous solutions of equations Find inverses of rational functions Quadratics by taking square roots: strategy Zero product property Strategy in solving quadratics Rational equations intro Solving square-root equations: one solution Quadratic word problem: ball Worked example: completing the square (leading coefficient ≠ 1)Worked example: quadratic formula (negative coefficients)Solving quadratics by taking square roots Completing the square The quadratic formula Intro to square-root equations & extraneous solutions Solving cube-root equations Solving quadratics by factoring Worked example: Completing the square (intro)Solving quadratics by completing the square: no solution Finding the vertex of a parabola in standard form Worked example: quadratic formula (example 2)Using the quadratic formula: number of solutions Rational equations word problem: combined rates (example 2)Rational equations word problem: eliminating solutions Rational equations word problem: combined rates Equation that has a specific extraneous solution Interpret quadratic models: Factored form Solve by completing the square: Non-integer solutions Solving quadratics using structure Finding inverses of rational functions Solve by completing the square: Integer solutions Zero product property Equations with rational expressions Strategy in solving quadratic equations Solving quadratics by taking square roots examples Solving square-root equations: no solution Solving quadratics by taking square roots: with steps Equations with rational expressions (example 2)Solving quadratics by factoring: leading coefficient ≠ 1 Extraneous solutions Solving square-root equations: two solutions Worked example: Rewriting & solving equations by completing the square Square-root equations intro

1-on-1 AI tutoring aligned to NC.M2.A-REI.1. 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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