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 Tennessee Academic Standards for Mathematics.

S: Statistics | S

Statistics | S

Print

The Statistics course follows a one-semester college-level structure organized across nine topics: Sampling and Data, Descriptive Statistics, Probability, Discrete and Continuous Random Variables, the Normal Distribution, the Central Limit Theorem, Confidence Intervals, Hypothesis Testing, and Regression and Correlation. Each topic builds toward formal statistical inference. The course is aligned with introductory college statistics.

S.1Topic 1: Sampling and Data S.2Topic 2: Descriptive Statistics S.3Topic 3: Probability S.4Topic 4: Discrete Random Variables S.5Topic 5: Continuous Random Variables and the Normal Distribution S.6Topic 6: Central Limit Theorem S.7Topic 7: Confidence Intervals S.8Topic 8: Hypothesis Testing S.9Topic 9: Regression and Correlation

Example Problems

The frequency table shows how many cups of coffee employees drank at work:

Cups of Coffee	Number of Employees
0	2
1	6
2	4
3	2
4	1

Which number of cups was least common?

Identify any outliers from the following table:

Data Value
84
7
9
8

If you flip three fair coins, what is the probability that you'll get at least two heads?

Justin, Cam, and Ben are playing a board game where exactly one player will win.
The table shows an incomplete probability model for who will win the board game.

Players	Probability
Justin	20%
Cam	50%
Ben	?

What is the probability that Ben will win the board game?

The Metro Cinema surveyed a random sample of 70 moviegoers about concession purchases.
Of the moviegoers surveyed, 49 said they buy popcorn. The cinema sells tickets to 2,100 patrons per week.
Based on the data, what is the most reasonable estimate for the number of weekly patrons who buy popcorn?

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 →