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.

CC.2.2.HS.C.3

Write functions or sequences that model relationships between two quantities.

Example Problems

Find the sum:

\sum_{k = 0}^{60} (4 - 3k) =

Find the sum:

\sum_{k=1}^{40} 2(-0.8)^{k-1}

Find the sum:

\sum_{k = 5}^{45} (3k - 28) =

Khan Academy Resources

Logarithm change of base rule intro Solving exponential equations using logarithms Exponential model word problems Solve exponential equations using logarithms: base-2 and other bases Solve exponential equations using logarithms: base-10 and base-e Equations & inequalities word problems Mixtures and combined rates word problems Evaluate logarithms: change of base rule Construct exponential models Modeling with sinusoidal functions Quadratic equations word problem: triangle dimensions Quadratic equations word problem: box dimensions Rational equations word problem: eliminating solutions Evaluating logarithms: change of base rule Rational equations word problem: combined rates Constructing exponential models: percent change Trig word problem: modeling annual temperature Constructing exponential models: half life Solving exponential equations using logarithms: base-10 Combining mixtures example Exponential equation word problem Exponential model word problem: bacteria growth Rational equation word problem Exponential model word problem: medication dissolve Two-variable linear equations intro Quadratic inequality word problem Solving exponential equations using logarithms: base-2 Constructing exponential models Trig word problem: modeling daily temperature

1-on-1 AI tutoring aligned to CC.2.2.HS.C.3. 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 →