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.

North Carolina: Grade 4 Math Standards

44 standards · 5 domains

GEOMETRY

NC.4.G.1 Draw and identify points, lines, line segments, rays, angles, and perpendicular and parallel lines.
NC.4.G.2 Classify quadrilaterals and triangles based on angle measure, side lengths, and the presence or absence of parallel or perpendicular lines.
NC.4.G.3 Recognize symmetry in a two-dimensional figure, and identify and draw lines of symmetry.

MEASUREMENT AND DATA

NC.4.MD.1.a Measure to solve problems involving metric units: centimeter, meter, gram, kilogram, Liter, milliliter.
NC.4.MD.1.b Add, subtract, multiply, and divide to solve one-step word problems involving whole-number measurements of length, mass, and capacity that are given in metric units.
NC.4.MD.2 Use multiplicative reasoning to convert metric measurements from a larger unit to a smaller unit using place value understanding, two-column tables, and length models.
NC.4.MD.3.a Find areas of rectilinear figures with known side lengths.
NC.4.MD.3.b Solve problems involving a fixed area and varying perimeters and a fixed perimeter and varying areas.
NC.4.MD.3.c Apply the area and perimeter formulas for rectangles in real world and mathematical problems.
NC.4.MD.4.a Collect data by asking a question that yields numerical data.
NC.4.MD.4.b Make a representation of data and interpret data in a frequency table, scaled bar graph, and/or line plot.
NC.4.MD.4.c Determine whether a survey question will yield categorical or numerical data.
NC.4.MD.6.a Understand angles as geometric shapes that are formed wherever two rays share a common endpoint, and are measured in degrees.
NC.4.MD.6.b Measure and sketch angles in whole-number degrees using a protractor.
NC.4.MD.6.c Solve addition and subtraction problems to find unknown angles on a diagram in real-world and mathematical problems.
NC.4.MD.8 Solve word problems involving addition and subtraction of time intervals that cross the hour.

NUMBER AND OPERATIONS IN BASE TEN

NC.4.NBT.1 Explain that in a multi-digit whole number, a digit in one place represents 10 times as much as it represents in the place to its right, up to 100,000.
NC.4.NBT.2 Read and write multi-digit whole numbers up to and including 100,000 using numerals, number names, and expanded form.
NC.4.NBT.4 Add and subtract multi-digit whole numbers up to and including 100,000 using the standard algorithm with place value understanding.
NC.4.NBT.5 Multiply a whole number of up to three digits by a one-digit whole number, and multiply up to two two-digit numbers with place value understanding using area models, partial products, and the properties of operations. Use models to make connections and develop the algorithm.
NC.4.NBT.6 Find whole-number quotients and remainders with up to three-digit dividends and one-digit divisors with place value understanding using rectangular arrays, area models, repeated subtraction, partial quotients, properties of operations, and/or the relationship between multiplication and division.
NC.4.NBT.7 Compare two multi-digit numbers up to and including 100,000 based on the values of the digits in each place, using >, =, and < symbols to record the results of comparisons.

NUMBER AND OPERATIONS – FRACTIONS

NC.4.NF.1 Explain why a fraction is equivalent to another fraction by using area and length fraction models, with attention to how the number and size of the parts differ even though the two fractions themselves are the same size.
NC.4.NF.2.a Reasoning about their size and using area and length models.
NC.4.NF.2.b Using benchmark fractions 0, , and a whole.
NC.4.NF.2.c Comparing common numerator or common denominators.
NC.4.NF.3.a Understand addition and subtraction of fractions as joining and separating parts referring to the same whole.
NC.4.NF.3.b Decompose a fraction into a sum of unit fractions and a sum of fractions with the same denominator in more than one way using area models, length models, and equations.
NC.4.NF.3.c Add and subtract fractions, including mixed numbers with like denominators, by replacing each mixed number with an equivalent fraction, and/or by using properties of operations and the relationship between addition and subtraction.
NC.4.NF.3.d Solve word problems involving addition and subtraction of fractions, including mixed numbers by writing equations from a visual representation of the problem.
NC.4.NF.4.a Model and explain how fractions can be represented by multiplying a whole number by a unit fraction, using this understanding to multiply a whole number by any fraction less than one.
NC.4.NF.4.b Solve word problems involving multiplication of a fraction by a whole number.
NC.4.NF.6.a Express, model and explain the equivalence between fractions with denominators of 10 and 100.
NC.4.NF.6.b Use equivalent fractions to add two fractions with denominators of 10 or 100.
NC.4.NF.6.c Represent tenths and hundredths with models, making connections between fractions and decimals.
NC.4.NF.7 Compare two decimals to hundredths by reasoning about their size using area and length models, and recording the results of comparisons with the symbols >, =, or <. Recognize that comparisons are valid only when the two decimals refer to the same whole.

OPERATIONS AND ALGEBRAIC THINKING

NC.4.OA.1 Interpret a multiplication equation as a comparison. Multiply or divide to solve word problems involving multiplicative comparisons using models and equations with a symbol for the unknown number. Distinguish multiplicative comparison from additive comparison.
NC.4.OA.3.a Use estimation strategies to assess reasonableness of answers.
NC.4.OA.3.b Interpret remainders in word problems.
NC.4.OA.3.c Represent problems using equations with a letter standing for the unknown quantity.
NC.4.OA.4.a Recognize that a whole number is a multiple of each of its factors.
NC.4.OA.4.b Determine whether a given whole number is a multiple of a given one-digit number.
NC.4.OA.4.c Determine if the number is prime or composite.
NC.4.OA.5 Generate and analyze a number or shape pattern that follows a given rule.