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-LE.2

Construct linear and exponential functions, including arithmetic and geometric sequences, given a graph, a description of a relationship, or two input-output pairs (include reading these from a table).

Example Problems

Find an explicit formula,

f(n)

, for the arithmetic sequence:

-2, 3, 8, 13, ...

Find an explicit formula,

f(n)

, for the following geometric sequence:

5, 15, 45, 135, \ldots

Find an explicit formula,

f(x)

, for the geometric sequence:

125, 25, 5, 1, ...

Khan Academy Resources

Logarithm change of base rule intro Writing slope-intercept equations Intro to slope-intercept form Intro to slope Solving exponential equations using logarithms Slope formula Slope review Slope-intercept form review Slope-intercept intro Slope from two points Exponential model word problems Slope-intercept from two points Solve exponential equations using logarithms: base-2 and other bases Slope from graph Solve exponential equations using logarithms: base-10 and base-e Linear models word problems Slope-intercept equation from graph Slope from equation Evaluate logarithms: change of base rule Construct exponential models Slope-intercept equation from graph Slope-intercept form problems Worked example: slope from graph Converting to slope-intercept form Slope of a line: negative slope Worked example: slope from two points Slope of a horizontal line Slope-intercept equation from slope & point Slope-intercept equation from two points Evaluating logarithms: change of base rule Constructing exponential models: percent change Constructing exponential models: half life Solving exponential equations using logarithms: base-10 Linear functions word problem: iceberg Linear functions word problem: paint Exponential model word problem: bacteria growth Slope & direction of a line Exponential model word problem: medication dissolve Positive & negative slope Slope from equation Two-variable linear equations intro Intro to slope-intercept form Solving exponential equations using logarithms: base-2 Worked examples: slope-intercept intro Constructing exponential models Intro to slope

1-on-1 AI tutoring aligned to F-LE.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 →