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treemarks.ai

Understand your grade.
Know what to work on.

Human accountability

A human is responsible for your grade.

Consistent treatment

When staff change a rubric decision after one regrade, matching work is checked for the same credit.

Conceptual feedback

See what your work demonstrated, the specific idea that is missing, and what to work on next.

A reason for the credit. A next step.

In this example, the cash-flow setup and discounting of annual savings earn credit. The missing step is to discount the final payment, too: money received eight years from now cannot be added directly to money today.

Engineering economy course
Problem Set 3 — Graded
Sample Student
83 / 100
83%
ProblemScore
P1 · Simple vs. compound interest20 / 20
P2 · Equivalent uniform annual cost16 / 20
P3 · Internal rate of return25 / 25
P4 · Present-worth comparison8 / 10
P5 · Benefit–cost & sensitivity14 / 25
P4 · Present-worth comparison
8 / 10
Rubric
Places the initial cost, annual savings, and terminal salvage with the correct sign and timing 4 / 4
Discounts the annual savings to the present, but adds the year-8 salvage value without discounting it 4 / 6
  1. The $12,000 arrives in year 8. Bring it to year 0 using 12,000 ÷ 1.08⁸ before adding it to the other present values.
  • Course reference: time value of money — single future payment.
Your work
+3,200/yr +12k −28k 0 8
PW = −28,000 + 3,200(P/A, 8%, 8) + 12,000
PW ≈ $2,389
Synthetic example, not a real submission.

A calculation slip and a missing idea are different.

The rubric identifies the concepts assessed by each question. Arithmetic and execution errors are treated under your course’s stated policy. An equivalent correct method should earn the same conceptual credit, unless the assignment specifically asks you to demonstrate a particular method.

You can question the decision.

AI can misread work or apply a rubric incorrectly. Your work and the applied criteria stay together so you and your teaching team can examine what happened. Use your course’s regrade process if the feedback does not match what you submitted. Point to the rubric item and the part of your work you want the teaching team to review.

Read the grading commitments.

The Treemarks Standard