Sample report. A made-up Grade 8 class of 28 on an Illustrative Mathematics worksheet. Your report looks like this when you end a session.

Class report · Grade 8 · Ended Oct 15, 6:41 PM

Solving Linear Equations

4 grades aren’t final yet. 3 are waiting on you, and 1 is still being graded. This report updates as they come in.

finished every problem
26/28
222 problems submitted
class average
88%
on graded work
problems to revisit
2
class average below 75%
of grading done for you
1 h 49 m
at about 30 seconds a problem

How the class scored

Each creature is one student’s score on the work graded so far.
  • Below 60%1
  • 60–69%4
  • 70–79%1
  • 80–89%5
  • 90–100%17

Problem by problem

  • Full credit
  • Partial
  • Under half
  • Not final yet
  • Not submitted
  1. 1Solve 3(x − 4) = 12x95%
  2. 2Solve each of these equations. Explain or show your reasoning.98%
  3. 3Solve each equation, and check your solution.96%
  4. 4Solve each of these equations. Explain or show your reasoning.82%
  5. 5Solve each equation and check your solution.96%
  6. 6Andre solved an equation, but when he checked his answer he saw his…Revisit67%
  7. 7Clare was solving an equation, but when she checked her answer she…Revisit65%
  8. 8Elena said the equation 9x + 15 = 3x + 15 has no solutions because 9x…96%

Where students struggled

The 2 problems with the lowest class average, and the mistakes behind them.

Problem 7

Distributing a negative sign

65%13 of 26 lost points
Clare was solving an equation, but when she checked her answer she saw her solution was incorrect. Where is Clare’s mistake and what is the solution to the equation?12(5 + 2y) = 4y − (5 − 9y)

Common mistakes

  • 6students

    Fixed 12 · 5 = 60, but still turned −(5 − 9y) into −5 − 9y, so got y = −65/29.

    • Jordan T.
    • Ethan C.
    • Lucas F.
    • Elijah V.
    • Daniel E.
    • Mateo R.
  • 5students

    Re-solved from scratch without naming Clare’s mistake, and most repeated her sign error.

    • Liam P.
    • Noah B.
    • Benjamin Q.
    • Henry Z.
    • Sebastian I.
  • 2students

    Got y = −65/11 but didn’t say which of Clare’s steps went wrong.

    • Sofia M.
    • Mia D.

2 grades on this problem aren’t final yet (Ava L., James O.). They’ll appear here once they’re graded.

Mistakes grouped by AI from the grader’s reason for each score.

Problem 6

Finding the error in a worked solution

67%11 of 27 lost points
Andre solved an equation, but when he checked his answer he saw his solution was incorrect. Where is Andre’s mistake and what is the solution to the equation?−2(3x − 5) = 4(x + 3) + 8

Common mistakes

  • 7students

    Blamed the first step (distributing the −2), which is correct, and kept Andre’s x = 5.

    • Liam P.
    • Ethan C.
    • Noah B.
    • Lucas F.
    • Benjamin Q.
    • Henry Z.
    • Sebastian I.
  • 4students

    Found the wrong step, then solved 10 = 10x + 20 as x = 1 instead of −1.

    • Jordan T.
    • Elijah V.
    • Daniel E.
    • Mateo R.

1 grade on this problem isn’t final yet (Abigail Y.). They’ll appear here once they’re graded.

Mistakes grouped by AI from the grader’s reason for each score.