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.

9.3.2.4

Construct logical arguments and write proofs of theorems and other results in geometry, including proofs by contradiction. Express proofs in a form that clearly justifies the reasoning, such as two-column proofs, paragraph proofs, flow charts or illustrations.

Khan Academy Resources

Inscribed angle theorem proof Angle-angle triangle similarity criterion Prove theorems using similarity Prove triangle similarity Prove triangle properties Prove parallelogram properties Line and angle proofs Proofs with transformations Inscribed angle theorem proof Proof: Right triangles inscribed in circles Proof of the law of cosines Proof of the law of sines Proof: The diagonals of a kite are perpendicular Proof: radius is perpendicular to a chord it bisects Geometry proof problem: congruent segments Geometry proof problem: midpoint Proofs concerning isosceles triangles Proofs concerning equilateral triangles Proof: perpendicular radius bisects chord Intro to angle bisector theorem Exploring medial triangles Proof: Opposite angles of a parallelogram Proof: Rhombus diagonals are perpendicular bisectors Proof: Opposite sides of a parallelogram Proof: Diagonals of a parallelogram Proof: Rhombus area Geometry proof problem: squared circle Proof: perpendicular lines have opposite reciprocal slopes Proving triangle medians intersect at a point Proving slope is constant using similarity Proof: Radius is perpendicular to tangent line Proof: Parallel lines divide triangle sides proportionally Proof: Segments tangent to circle from outside point are congruent Proof: parallel lines have the same slope Inscribed quadrilaterals proof Proofs with transformations

1-on-1 AI tutoring aligned to 9.3.2.4. 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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