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.

A1.DS.A.4b

Recognize possible associations and trends in the data.

Example Problems

John and Lauren are looking for a good neighborhood to raise their children. They want neighbors who have kids and who are fellow rollerbladers as well. The couple surveys a random sample of residents in a nice-looking neighborhood. Their results are shown below.

Lena rollerblades every morning. Omar does not have children. Zoe is an artist, but that's all we know.

Calculate the following probability based on the frequency table below.

	Kids	No kids	Row total
Rollerblader	41	9	50
Not a rollerblader	3	9	12
Column total	44	18	62

Probability that Lena has kids = ?

Write your answer as a percent.

John and Lauren are looking for a good neighborhood to raise their children. They want neighbors who have kids and who are fellow rollerbladers as well. The couple surveys a random sample of residents in a nice-looking neighborhood. Their results are shown below.

Matthew, Patrick, and Susan live in the neighborhood. Matthew rollerblades every Sunday. Patrick is a computer programmer, but that's all we know about him. Susan is a stay-at-home mom.

Calculate the following probabilities based on the frequency table below.

	Kids	No kids	Row total
Rollerblader	41	9	50
Not a rollerblader	3	9	12
Column total	44	18	62

Probability that Matthew doesn't have kids = ?
Write your answer as a percent.

John and Lauren are looking for a good neighborhood to raise their children. They want neighbors who have kids and who are fellow rollerbladers as well. The couple surveys a random sample of residents in a nice-looking neighborhood. Their results are shown below.

Diego, Mei, and Aria live in the neighborhood. Diego is very tall. Mei has never rollerbladed. Aria is a parent of twins.

Calculate the following probability based on the frequency table below.

	Kids	No kids	Row total
Rollerblader	41	9	50
Not a rollerblader	3	9	12
Column total	44	18	62

Probability that Diego rollerblades = ?
Write your answer as a percent rounded to the nearest hundredth.

1-on-1 AI tutoring aligned to A1.DS.A.4b. 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 →