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?

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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 taught?

This standard is part of the A-REI curriculum in Alaska Mathematics Standards.

Reasoning with Equations and Inequalities Math Standards | Alaska | Alaska Mathematics Standards

Reasoning with Equations and Inequalities

Reasoning with Equations and Inequalities covers the justification and solution of equations and systems across multiple forms: linear, quadratic, and exponential. Methods include properties of equality, factoring, completing the square, the quadratic formula, and graphing. Systems of equations are solved algebraically and graphically, with matrix methods available at advanced levels.

A-REI.1Apply properties of mathematics to justify steps in solving equations in one variable.A-REI.10Understand that the graph of an equation in two variables is the set of all its solutions plotted in the coordinate plane, often forming a curve (which could be a line).A-REI.11Explain why the x-coordinates of the points where the graphs of the equations y = f(x) and y = g(x) intersect are the solutions of the equation f(x) = g(x); find the solutions approximately, e.g., using technology to graph the functions, make tables of values, or find successive approximations. Include cases where f(x) and/or g(x) are linear, polynomial, rational, absolute value, exponential, and logarithmic functions.A-REI.12Graph the solutions to a linear inequality in two variables as a half-plane (excluding the boundary in the case of a strict inequality), and graph the solution set to a system of linear inequalities in two variables as the intersection of the corresponding half-planes.A-REI.2Solve simple rational and radical equations in one variable, and give examples showing how extraneous solutions may arise.A-REI.3Solve linear equations and inequalities in one variable, including equations with coefficients represented by letters.A-REI.4Solve quadratic equations in one variable.A-REI.5Show that, given a system of two equations in two variables, replacing one equation by the sum of that equation and a multiple of the other produces a system with the same solutions.A-REI.6Solve systems of linear equations exactly and approximately, e.g., with graphs or algebraically, focusing on pairs of linear equations in two variables.A-REI.7Solve a simple system consisting of a linear equation and a quadratic equation in two variables algebraically and graphically. For example, find the points of intersection between the line y = –3x and the circle x^2 + y^2 = 3.A-REI.8(+) Represent a system of linear equations as a single matrix equation in a vector variable.A-REI.9(+) Find the inverse of a matrix if it exists and use it to solve systems of linear equations (using technology for matrices of dimension 3 × 3 or greater).

Example Problems

Solve the equation:

\sqrt{x + 9} + 2 = 5

Graph:

x = 4

What is the area of the region between the graphs of

f(x) = x^2 + 1

and

g(x) = 4

(3, 5)

a solution of

y > x + 1

Solve for x:

\frac{4x}{x + 1} = 2

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A-REI: Reasoning with Equations and Inequalities

Reasoning with Equations and Inequalities