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.

AMDM.FGR.9.2

Use linear, exponential, logistic, and piecewise functions to construct a model.

Example Problems

A small farm has 120 hens. Each month, the farm acquires 5 additional hens.

Which kind of function (exponential, linear, or neither) best models the relationship between time and the number of hens?

Tanya has a valuable stamp collection worth

\$750

.
Each decade the collection's value increases by

12\%

.

Which kind of function (exponential, linear, or neither) best models the relationship between time and the collection's value?

A newly discovered star has an initial brightness of 500 lumens.
Each month, the star's brightness decreases by

5\%

.

Which kind of function (exponential, linear, or neither) best models the relationship between time and the star's brightness?

Khan Academy Resources

Rewrite exponential expressions Piecewise functions graphs Interpret time in exponential models Equivalent forms of exponential expressions Interpret change in exponential models: changing units Interpret change in exponential models: with manipulation Interpret change in exponential models Evaluate piecewise functions Interpreting change in exponential models Interpreting change in exponential models: changing units Worked example: graphing piecewise functions Interpreting time in exponential models Worked example: evaluating piecewise functions Interpreting change in exponential models: with manipulation Introduction to piecewise functions Worked example: domain & range of piecewise linear functions Rewriting exponential expressions as A⋅Bᵗ Equivalent forms of exponential expressions Worked example: domain & range of step function

1-on-1 AI tutoring aligned to AMDM.FGR.9.2. 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.

Free for teachers, forever →