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 AFA taught?

This standard is part of the AFA curriculum in Georgia Standards of Excellence - Mathematics.

AFA: Advanced Financial Algebra

Advanced Financial Algebra

Print

AFA.DSRAFA.DSR AFA.DSRaData & Statistical Reasoning – Data Displays AFA.DSRbData & Statistical Reasoning – Investigative Research AFA.FGRFunctional & Graphical Reasoning – Linear, Exponential, Quadratic, Cubic, Rational, Square Root, Greatest Integer, and Piecewise Functions AFA.GSRGeometric & Spatial Reasoning – Polygons, Circles, and Trigonometry AFA.MMMathematical Modeling AFA.NRNumerical (Quantitative) Reasoning – Fractions, Decimals, Percents, and Ratios AFA.PARAFA.PAR AFA.PARaPatterning & Algebraic Reasoning – Formulas AFA.PARbPatterning & Algebraic Reasoning – Systems Of Equations and Inequalities

Example Problems

A university dean wants to estimate the mean GPA of graduating seniors. They'll sample

n

students to build a 95% confidence interval for the mean with a margin of error of no more than

0.10

. Prior data suggests that the standard deviation of GPAs is

σ = 0.42

.

Which of these is the smallest approximate sample size required to obtain the desired margin of error?

Find

f(-10)

for the piecewise function

f(x)

.

f(x) = \begin{cases} 3x + 4 & , & x < -8 \\ x^2 + 2x - 1 & , & -8 \leq x < 5 \\ 11 - x & , & x \geq 5 \end{cases}

The following are all angle measures (in radians, rounded to the nearest hundredth) whose sine is

0.34

.
Which is the principal value of

\arcsin(0.34)

?

Solve for x:

\frac{7}{3} = \frac{4}{x}

Write your answer as a decimal rounded to the nearest hundredth or a fraction, improper fraction, or mixed number.

Pierre wants to make tables and chairs.

He has a total of 220 wooden boards and 760 nails.

13x + 8m \leq 220

represents the number of tables x and chairs m he can make with 220 wooden boards.

48x + 37m \leq 760

represents the number of tables and chairs he can make with 760 nails.

Does Pierre have enough boards and nails to make 9 tables and 5 chairs?

1-on-1 AI tutoring aligned to AFA. 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 →