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.

8.13

Determine whether a relation is a function, defining a function as a rule that assigns to each input (independent value) exactly one output (dependent value), and given a graph, table, mapping, or set of ordered pairs.

Example Problems

Evaluate:

f(x) = 5x - 3

for

f(5)

Evaluate:

f(x) = 7x - 14

for

f(3)

Evaluate:

f(x) = 9x - 27

for

f(5)

Khan Academy Resources

Writing slope-intercept equations Intro to slope-intercept form Graphing slope-intercept form Intercepts of lines review (x-intercepts and y-intercepts)Graphing lines from slope-intercept form review Slope-intercept form review Solutions to 2-variable equations Intercepts from a graph Evaluate functions Slope-intercept from two points Evaluate functions from their graph Graph from slope-intercept form Linear equations word problems Function rules from equations Slope-intercept equation from graph Complete solutions to 2-variable equations Recognize functions from tables Recognize functions from graphs Equations vs. functions Slope-intercept equation from graph Manipulating formulas: temperature Recognizing functions from table Testing if a relationship is a function Graph from slope-intercept equation Slope-intercept equation from slope & point Slope-intercept equation from two points Recognizing functions from graph Relations and functions Worked example: Evaluating functions from equation What is a function?Does a vertical line represent a function?x-intercept of a line Worked example: solutions to 2-variable equations Completing solutions to 2-variable equations Intro to slope-intercept form Solutions to 2-variable equations Intro to intercepts Checking if a table represents a function Worked example: Evaluating functions from graph Checking if an equation represents a function Recognizing functions from verbal description Intercepts from a table Recognizing functions from verbal description word problems

1-on-1 AI tutoring aligned to 8.13. 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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