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 AII-S taught?

This standard is part of the AII-S curriculum in New York State Next Generation Mathematics Learning Standards.

AII-S: AII-S

AII-S

Print

AII-S.CPStatistics and Probability - Conditional Probability and the Rules of Probability AII-S.ICStatistics and Probability - Making Inferences and Justifying Conclusions AII-S.IDStatistics and Probability - Interpreting Categorical and Quantitative Data

Example Problems

A bag contains 9 blue candies, 7 red candies and 5 green candies.
A candy is chosen from the bag at random.

Find the probability that the candy is: Not Orange

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.

Zara studied the age (in years) and resale value (in thousand dollars) of a random sample of 40 used cars. Here is computer output on the sample data:

Regression: resale value vs. age

Predictor	Coef	SE Coef
Constant	18.7	0.9
Age	-1.85	0.31

S = 2.62

R\text{-sq} = 68.1\%

Assume that all conditions for inference have been met.

Write the expression for the test statistic for testing the null hypothesis that the population slope in this setting is

0

.

Two fair six-sided dice are rolled.

What is the probability that both dice show an even number?
Round your answer to two decimal places.

What is the critical value

z^{*}

for constructing a 90% confidence interval?

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