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 NC.8.SP.4.b taught?

This standard is part of the NC curriculum in North Carolina Standard Course of Study - Mathematics.

Are there practice problems for NC.8.SP.4.b?

Yes, there are 3 practice problems available for NC.8.SP.4.b with worked examples.

What learning resources are available for NC.8.SP.4.b?

There are 9 Khan Academy resources available for NC.8.SP.4.b, including 3 videos, 5 exercises, 1 articles.

NC.8.SP.4.b: Use relative frequencies calculated for rows or columns to describe possible association between the two variables.

Use relative frequencies calculated for rows or columns to describe possible association between the two variables.

Example Problems

An organization surveyed its employees on satisfaction with a training program.

Department	Satisfied	Not Satisfied	TOTAL
HR	12	3	15
IT	18	6	24
Sales	20	10	30
TOTAL	50	19	69

What percent of Sales employees were satisfied?

A poll surveyed voters' party preference.

Party	18–29	30–49	50+	TOTAL
Party A	40	60	50	150
Party B	30	40	30	100
TOTAL	70	100	80	250

What percent of voters aged 30–49 preferred Party B?

A survey recorded car ownership across different regions.

Car Type	Urban	Rural	TOTAL
Sedan	50	30	80
SUV	40	50	90
Truck	10	20	30
TOTAL	100	100	200

What fraction of rural respondents own an SUV?

Khan Academy Resources

Two-way frequency tables Create two-way frequency tables Interpret two-way tables Read two-way frequency tables Analyze two-way frequency tables Create two-way relative frequency tables Two-way frequency tables and Venn diagrams Interpreting two-way tables Two-way relative frequency tables

1-on-1 AI tutoring aligned to NC.8.SP.4.b. 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.

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