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.

What grade level is A-REI.3 taught?

This standard is part of the A-REI curriculum in Mississippi College- and Career-Readiness Standards for Mathematics.

Are there practice problems for A-REI.3?

Yes, there are 3 practice problems available for A-REI.3 with worked examples.

What learning resources are available for A-REI.3?

There are 31 Khan Academy resources available for A-REI.3, including 18 videos, 11 exercises, 2 articles.

A-REI.3: Solve linear equations and inequalities in one variable, including equations with coefficients represented by letters. | Mississippi College- and Career-Readiness Standards for Mathematics

Solve linear equations and inequalities in one variable, including equations with coefficients represented by letters.

Example Problems

Solve for x:

-5x < 20

Solve for x:

8x < -16

Solve for x:

-x < 9

Khan Academy Resources

Multi-step equations review Compound inequalities review Equations with parentheses Linear equations with unknown coefficients Sums of consecutive integers Compound inequalities Equations with variables on both sides Multi-step linear inequalities Intercepts from an equation Equation practice with angle addition Slope-intercept from two points Equations with parentheses: decimals & fractions Equations with variables on both sides: decimals & fractions Equation with the variable in the denominator Compound inequalities: OR Compound inequalities: AND A compound inequality with no solution Double inequalities Compound inequalities examples Equations with variables on both sides: 20-7x=6x-6 Equations with parentheses Equation with variables on both sides: fractions Sum of integers challenge Intercepts from an equation Worked example: intercepts from an equation Slope-intercept equation from two points Intro to equations with variables on both sides Equation practice with supplementary angles Sums of consecutive integers Equation practice with vertical angles Linear equations with unknown coefficients

1-on-1 AI tutoring aligned to A-REI.3. 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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