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.

9.4.1.3

Use scatterplots to analyze patterns and describe relationships between two variables. Using technology, determine regression lines (line of best fit) and correlation coefficients; use regression lines to make predictions and correlation coefficients to assess the reliability of those predictions.

Example Problems

Seth is collecting data on his height over the years.
Seth has created a scatter plot that shows the relationship between his height,

h

, and the number of years,

x

. He thinks the data might show a linear relationship.

What graph will show a linear relationship if Seth's data is indeed linear?

Charles is collecting data on how many grapes his sister eats each day.
Charles has created a scatter plot that shows the relationship between the number of grapes his sister has eaten,

g

, and the number of days,

x

. He thinks the data might show a linear relationship.

What graph will show a linear relationship if Charles's data is indeed linear?

Ivy is dropping small steel balls from rest and is collecting data on how far they fall over time.

Ivy has created a scatter plot that shows the relationship between the distance fallen,

s

, and the time,

t

. She thinks the data might show that

s

is a quadratic function of

t

.

What graph will show a linear relationship if

s(t)

is indeed a quadratic function?

Khan Academy Resources

Equations of trend lines: Phone data Correlation coefficient intuition Interpreting slope of regression line Introduction to residuals and least-squares regression Bivariate relationship linearity, strength and direction Example: Correlation coefficient intuition

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