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.

7.SP.8b

Represent sample spaces for compound events using methods such as organized lists, tables and tree diagrams. For an event described in everyday language (e.g. “rolling double sixes”), identify the outcomes in the sample space which compose the event.

Example Problems

Julia has 5 different bracelets, 3 different necklaces, and 2 different pairs of earrings. She wants to pick exactly one bracelet, one necklace, and one pair of earrings to wear to a party.

How many different jewelry combinations can she make?

A sandwich shop offers 3 types of bread, 4 types of meat, 3 types of cheese, and 5 different toppings. Each customer can choose exactly 1 bread, 1 meat, 1 cheese, and 1 topping.

How many unique sandwiches can a customer order?

Damien is traveling by train. There are 2 departure stations to choose from, then he must select a connecting stop from 5 possible stops, and finally he must choose a final destination out of 2 options.

How many distinct travel itineraries can Damien plan?

Khan Academy Resources

Sample spaces for compound events Probabilities of compound events Die rolling probability Count outcomes using tree diagram Probability of a compound event Sample spaces for compound events Counting outcomes: flower pots

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