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 N-VM taught?

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

N-VM: N-VM

N-VM

Print

N-VM.1Recognize vector quantities as having both magnitude and direction. Represent vector quantities by directed line segments, and use appropriate symbols for vectors and their magnitudes (e.g., v, |v|, ||v||, v).N-VM.10Understand that the zero and identity matrices play a role in matrix addition and multiplication similar to the role of 0 and 1 in the real numbers. The determinant of a square matrix is nonzero if and only if the matrix has a multiplicative inverse.N-VM.11Multiply a vector (regarded as a matrix with one column) by a matrix of suitable dimensions to produce another vector. Work with matrices as transformations of vectors.N-VM.12Work with 2 × 2 matrices as transformations of the plane, and interpret the absolute value of the determinant in terms of area.N-VM.2Find the components of a vector by subtracting the coordinates of an initial point from the coordinates of a terminal point.N-VM.3Solve problems involving velocity and other quantities that can be represented by vectors.N-VM.4Add and subtract vectors.N-VM.5Multiply a vector by a scalar.N-VM.6Use matrices to represent and manipulate data, e.g., to represent payoffs or incidence relationships in a network.N-VM.7Multiply matrices by scalars to produce new matrices, e.g., as when all of the payoffs in a game are doubled.N-VM.8Add, subtract, and multiply matrices of appropriate dimensions.N-VM.9Understand that, unlike multiplication of numbers, matrix multiplication for square matrices is not a commutative operation, but still satisfies the associative and distributive properties.

Example Problems

These are the component forms of vectors

\vec{i}

and

\vec{j}

:

\vec{i} = (-6, 9)

\vec{j} = (3, 3)

Add the vectors.

Vector

\vec{AB}

has a terminal point

(-5, -5)

, an x component of 3, and a y component of 3.

Find the coordinates of the initial point, A.

These are the component forms of vectors

\vec{u}

and

\vec{w}

:

\vec{u} = (2, 5)

\vec{w} = (3, -2)

Add the vectors.

These are the component forms of vectors

\vec{w}

and

\vec{x}

:

\vec{w} = (2, 5)

\vec{x} = (-8, 9)

Subtract the vectors.

The component form of vector

\vec{v}

is

\vec{v} = (2, 0)

.
Find

5\vec{v}

.

1-on-1 AI tutoring aligned to N-VM. 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.

Free for teachers, forever →