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.

M.A18.45

Understand that patterns of association can also be seen in bivariate categorical data by displaying frequencies and relative frequencies in a two-way table. Construct and interpret a two-way table summarizing data on two categorical variables collected from the same subjects. Use relative frequencies calculated for rows or columns to describe possible association between the two variables. (e.g., Collect data from students in your class on whether or not they have a curfew on school nights and whether or not they have assigned chores at home. Is there evidence that those who have a curfew also tend to have chores?)

Example Problems

Here is a table giving the number of neighborhood adults by bike usage and helmet use:

Helmet use	Rides bike	Does not ride bike
Always	45	10
Not always	15	30

Find the marginal distribution of bike usage in counts.
Rides bike =

Here is a table giving the number of neighborhood adults by bike usage and helmet use:

Helmet use	Rides bike	Does not ride bike
Always	45	10
Not always	15	30

Find the marginal distribution of bike usage in counts.
Does not ride bike =

Here is a table classifying 360 employees by department and work location:

Department	Remote	On-site
Sales	40	60
Engineering	85	55
Support	20	100

Find the marginal distribution of department in counts.
Sales =

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

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