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.

What grade level is S taught?

This standard is part of the S curriculum in Oklahoma Academic Standards for Mathematics.

S: Statistics & Probability (S)

Statistics & Probability (S)

Print

Statistics & Probability covers four strands: Statistical Questions, Data Collection, Data Analysis, and Probability. Students learn to formulate statistical questions, design studies, and evaluate sampling methods, then analyze distributions using measures of center, spread, and graphical displays. Probability covers both theoretical and experimental contexts, including sampling distributions and the foundations of inference.

S.DAData Analysis (DA)S.DCData Collection (DC)S.IRInterpretation of Results (IR)S.PProbability (P)S.QStatistical Questions (Q)

Example Problems

A restaurant states that no more than 10% of its takeout orders are prepared incorrectly. A food blogger thinks the true error rate is higher. They sample recent orders to investigate.

Let

p

represent the proportion of incorrect takeout orders.

State the null hypothesis,

H_0

, for this test.

The parks department will repaint 5 of 50 trail markers. They number the markers

01-50

and use the random digit table printed below to choose a simple random sample.

Which markers are in the sample?

76054, 41328, 37961, 20584, 43310

A tech company advertises that the average time it takes for a new laptop to fully start up is 20 minutes. An independent lab believes it starts up faster on average. They sample users to test the claim.

Let

\mu

represent the mean startup time.

State the alternative hypothesis,

H_a

, for this test.

Priya was testing

H_0: \mu = 20

versus

H_a: \mu < 20

with a sample of 12 observations. Her test statistic was

t = -2.228

. Assume that the conditions for inference were met.

What is the approximate P-value for Priya's test?
Round your answer to the nearest thousandth.

An animal shelter recorded details about dogs available for adoption.

Dog	Age (years)	Weight (lb)	Breed	Shots?
Buddy	4	52	mixed	yes
Luna	1	18	terrier	no
Duke	7	68	labrador	yes
...	...	...	...	...

Who or what are the individuals in this data set?

1-on-1 AI tutoring aligned to S. 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 →