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.

MA.912.DP.2.4

Fit a linear function to bivariate numerical data that suggests a linear association and interpret the slope and y-intercept of the model. Use the model to solve real-world problems in terms of the context of the data.

Example Problems

The image files captured by a drone have a mean size of

2.8 \text{ megabytes}

with a standard deviation of

0.6 \text{ megabytes}

.

What will be the mean of the distribution of file sizes in kilobytes?

1 \text{ megabyte}

equals

1024 \text{ kilobytes}

The distribution of heights of the twelve-year-old boys on Tim's rugby team had a mean of

150 \text{ cm}

and a standard deviation of

10 \text{ cm}

.

What will be the mean of the distribution of heights in feet?

1 \text{ cm}

approximately equals

0.033 \text{ ft}

A litter of newborn kittens had weights with a mean of

420 \text{ grams}

and a standard deviation of

60 \text{ grams}

.

What will be the mean of the distribution of weights in pounds?

1 \text{ gram}

approximately equals

0.0022 \text{ pounds}

Khan Academy Resources

Eyeballing the line of best fit Estimating equations of lines of best fit, and using them to make predictions Estimating slope of line of best fit Interpreting slope and y-intercept for linear models Fitting a line to data Interpreting slope of regression line Line of best fit: smoking in 1945 Estimating the line of best fit exercise Estimating with linear regression (linear models)Interpreting y-intercept in regression model

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