For the overall math picture, including the extraction caveat, read the math teachers page. This page is about the middle-school course that sits between arithmetic and algebra, where the skills are tightly stacked and a gap from sixth grade quietly surfaces in eighth.
The wrong rules students are following
- Bigger denominator, bigger fraction. 1/8 is seen as larger than 1/4 because 8 is larger than 4. This is a whole-number rule applied to the denominator.
- Add the tops and add the bottoms. 1/2 + 1/3 becomes 2/5. It is one of the most reliably documented fraction errors.
- Multiplication makes bigger and division makes smaller. True for whole numbers above one, false for fractions below one. Students then distrust a correct answer such as 6 divided by 1/2 equals 12.
- Larger digits, larger number, with negatives. -7 is seen as greater than -3 because 7 is greater than 3.
- Ratios are additive. Told that 2 cups of juice go with 3 cups of water, a student asked about 6 cups of juice adds 4 to both and answers 7 cups of water, instead of scaling by 3.
- Order of operations is a strict left-to-right ladder of letters. Students treat multiplication as always before division and addition as always before subtraction, rather than same-rank operations going left to right.
Wrong options that are wrong ideas
ClassSense practice items are multiple choice, and each wrong option is tied to a named misconception. A sketch (an illustration of the form, not a transcript of output):
A recipe uses 2 cups of juice for every 3 cups of water. If you use 6 cups of juice, how many cups of water do you need? (a) 7 (b) 9 (c) 4 (d) 12
Option (a) is additive thinking: 6 is 4 more than 2, so add 4 to 3. Option (d) doubles instead of tripling. The feedback for (a) should name the additive idea and show the scaling instead.
What uploads well
Unit notes in words, word problems, vocabulary (numerator, rate, ratio, integer, absolute value), strategy lists such as "three ways to compare fractions", and worked examples typed as text. Number-line reasoning described verbally works, and a lot of the middle-school misconception work is in the language: what a unit rate means, why a negative is further left.
What does not. Fraction bars and area models drawn as pictures, number lines, tape diagrams, ratio tables pasted as images, graphs of proportional relationships, and equations typeset as pictures do not extract. These are exactly the representations middle-school teaching leans on, so a lot of the visual reasoning will have to come from you in class. A table typed as text arrives as text, but test one unit before you commit a term.
A way to run it
Upload one unit
Fractions, ratios and proportions, or integers each have well-known errors and rich text.
Run practice for a week
Short sets fit the first ten minutes of class. Students who miss the same idea twice stand out in the grid.
Reteach from the data
If a third of the class chose the add-the-denominators option, a ten minute reteach with fraction strips is a better use of Monday than moving on.
The stacking problem
Because skills depend on each other, a unit that looked fine on the test can hide a missing prerequisite. Mastered skills come back later for a quick check, which is the mechanism for catching a skill that has quietly gone soft. The page on mastery tracking explains how the states work, and students who fall behind covers what to do next.
Limits
Students pick answers. They do not show working in the app, and no partial credit is given. Generated numerical items should be checked before release, as the routine in checking AI lessons for errors describes. The next course on is algebra.
Common questions
Does it handle fractions written as pictures?
No. Fraction models, number lines and tape diagrams that are images do not extract. Fractions written as text such as 3/4 come through.
Will it generate extra practice for students who struggle?
Practice can be regenerated at the difficulty you choose, and the grid shows which skill each student is stuck on.
Can students show their steps?
Not in the app. Practice is multiple choice. Work shown on paper is yours to mark.
Is it for a specific grade?
It follows the document and the grade level you set when you create the course.