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.

F-IF.C.8.b

Use the properties of exponents to interpret expressions for exponential functions. Apply to financial situations such as identifying appreciation and depreciation rate for the value of a house or car some time after its initial purchase. For example, identify percent rate of change in functions such as y = (1.02)^t, y = (0.97)^t, y = (1.01)^12t, and y = (1.2)^(t∕10), and classify them as representing exponential growth or decay.

Example Problems

I have a cockroach problem in my living room.

Don't ask how, but I counted 64 cockroaches today, and they are growing at a rate of 25% every day.

How many cockroaches will I have after three days?

The number of bacteria in a petri dish increases at a rate that is proportional at any time to the number at that time. The dish contained 1,200 bacteria initially, and the population quadruples every 20 minutes.

How many bacteria are in the dish after 50 minutes?

The population of an algae culture increases at a rate that is proportional at any time to the population at that time. The culture contained 500 cells initially, and the population triples every 9 hours.

What is the population of the algae culture after 15 hours?

Khan Academy Resources

Rewrite exponential expressions 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 Interpreting change in exponential models Interpreting change in exponential models: changing units Interpreting time in exponential models Interpreting change in exponential models: with manipulation Rewriting exponential expressions as A⋅Bᵗ Equivalent forms of exponential expressions

1-on-1 AI tutoring aligned to F-IF.C.8.b. Instant help for students, real-time insights for teachers.

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