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.

MA.912.NSO.3.1

Apply appropriate notation and symbols to represent vectors in the plane as directed line segments. Determine the magnitude and direction of a vector in component form.

Example Problems

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.

\vec{u} = (-9, 3)

Find the direction angle of

\vec{u}

.
Enter your answer as an angle in degrees between

0\degree

and

360\degree

rounded to the nearest hundredth.

Vector

\vec{AB}

has a terminal point

(-10, 8)

, an x component of

5

, and a y component of

0

.

Find the coordinates of the initial point, A.

Khan Academy Resources

Vector components from magnitude & direction (advanced)Vectors: FAQ Converting between vector components and magnitude & direction review Magnitude of vectors Direction of vectors Vector components from magnitude & direction Direction of vectors from components: 3rd & 4th quadrants Representing quantities with vectors Vector magnitude from components Vector magnitude from graph Vector magnitude from initial & terminal points Vector components from magnitude & direction Direction of vectors from components: 1st & 2nd quadrants Vector components from magnitude & direction: word problem

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