Bluebook is College Board's free app and the software you will use on test day, so it is the reference point. We couldn't confirm how closely any other app matches its screen. OnePrep's home page says its full-length tests have tools designed to resemble test day. ClassVal's practice includes a Desmos graphing calculator and formula reference sheet on Math questions, plus answer elimination and mark for review. It does not include highlights and notes or a line reader.
Practice the tools you will use on test day before test day. A tool you meet for the first time under a timer costs you minutes.
How We Compared These
ClassVal publishes this article, so read it with that in mind. We compared public information as of October 2026: College Board's Bluebook tools page, Khan Academy's public pages, UWorld's SAT calculator guide, OnePrep's home page and ClassVal's own app. We only report what a company's pages say. When a page does not mention a tool, we write that we couldn't find it. That is not the same as saying the tool is missing. Features change, so confirm on each company's site before you decide.
The Tools Bluebook Gives You on Test Day
College Board's Bluebook tools page lists nine tools. Knowing the list tells you what to practice with.
| Tool | What College Board says it does |
|---|---|
| Testing Timer | Shows time left in each test part; can be hidden until 5 minutes remain |
| Calculator | A draggable Desmos calculator |
| Reference Sheet | Shows commonly used formulas on tests with math questions |
| Highlights & Notes | Highlights text from a question or adds a note |
| Mark for Review | Flags a question with a bookmark icon so you can come back |
| Line Reader | Helps you focus while reading test content |
| Option Eliminator | Crosses out answer choices you think are wrong; can be undone |
| Question Menu | Shows skipped or flagged questions and lets you jump to any question in the section |
| Zoom | Enlarges parts of a question |
Three of these change how you actually work a question: the calculator, Option Eliminator and Mark for Review. If you drill without them, you build habits that Bluebook then interrupts.
What Each Source Says About Its Practice Tools
Here is what we could find on each company's own pages.
| Source | Desmos calculator | Eliminate, mark and highlight tools | Where full-length tests live |
|---|---|---|---|
| Bluebook (College Board) | Yes, a draggable Desmos calculator | Yes: Option Eliminator, Mark for Review, Highlights & Notes, Line Reader | In Bluebook itself |
| Khan Academy | We couldn’t load Khan’s course pages to check its toolbar | Not found on the pages we checked | See our Khan Academy comparison |
| UWorld SAT | Its calculator guide is headed "Practice With the Same Desmos Tool You’ll Use on Test Day" | Describes Bluebook’s tools; we did not find a statement about its own interface | Not checked |
| OnePrep | Not named on its home page | Home page says full-length tests have "timing and tools designed to resemble test day" without naming them | OnePrep full-length tests |
| ClassVal | Yes, in Math practice and full-length tests | Answer elimination and Mark for review; no highlights and notes or line reader | ClassVal adaptive full-length tests |
Treat the empty cells as questions to answer yourself. Open a free session on each tool, look at the toolbar, and check whether the thing you rely on is there.
Where Bluebook Is the Better Choice
If your goal is to rehearse the exact test-day screen, Bluebook wins. It is free, it is College Board’s own app, and it is the software you will use on test day. No third-party tool can claim to be more faithful to the real interface, and ClassVal does not try to. Khan Academy is the other obvious free choice; see our Khan Academy comparison for how it differs from ClassVal.
Where other tools can help is daily habit and targeted question practice. A daily question routine is a different job from a test-day rehearsal.
What ClassVal’s Practice Includes
Based on ClassVal’s own app, here is what you get in practice:
- Desmos graphing calculator on Math questions, in a draggable panel.
- Formula reference sheet on Math questions.
- Answer elimination. In practice sessions you can toggle it from the Tools menu; full-length tests always show it.
- Mark for review on each question. In practice sessions, your marks are remembered when you come back.
- A/B/C/D keyboard shortcuts in practice sessions, which you can switch on or off.
- Timer hide option in practice sessions. Full-length tests keep the clock visible.
- Question navigator in full-length tests.
What ClassVal does not currently have is highlights and notes or a line reader. If you rely on annotating passages, practice that in Bluebook. ClassVal also has a free plan; see its Premium page for current limits.
Which Tools Matter Most for You
| If you... | Practice most with | Why |
|---|---|---|
| Graph or check answers on the calculator | A tool with Desmos plus Bluebook | A calculator you have not practiced with can cost time under a timer |
| Cross out choices as you read | Any tool with elimination, and Bluebook | The habit transfers only if the tool lets you do it |
| Annotate passages | Bluebook | Highlights & Notes is the tool you will have on test day |
| Skip and return a lot | Tools with Mark for Review | Returning to flagged questions is a pacing skill |
| Need many questions daily | A daily-practice tool, then Bluebook for tests | Daily volume and test-day rehearsal are different jobs |
A Simple Plan
- Open the Bluebook tools page. Use the nine-tool list above as your checklist.
- Take one Bluebook practice section. Note which tools you actually reached for.
- Check your daily tool. Open it and look for those same tools.
- Fill the gaps in Bluebook. If your daily tool lacks one, rehearse it in a Bluebook section each week.
- Do a final full rehearsal in Bluebook before test day.
FAQ: Practice Tools and Test-Day Software
Does Khan Academy have the Desmos calculator?
We couldn’t load Khan Academy’s course pages to confirm this, so open a Khan Academy math exercise and check the toolbar yourself.
Do I need a prep app that copies Bluebook exactly?
No. Bluebook is free and is the real software. A prep app does not need to copy it, as long as you also practice in Bluebook before test day.
Does ClassVal have highlights and notes?
Not currently. ClassVal’s practice includes answer elimination, mark for review, a Desmos calculator and a reference sheet. For highlights and notes, use Bluebook.
Does OnePrep have answer elimination?
OnePrep’s home page says its full-length tests have timing and tools designed to resemble test day, which is a point in its favor if test-day feel is your priority. We couldn’t find a tool-by-tool list on that page, so check its practice screen. For pricing and free limits, see our OnePrep comparison.
Which tool should I practice with first?
Start with the Desmos calculator if you use it on Math questions. It is one tool that can cost you time if you meet it cold. Then Option Eliminator and Mark for Review.
Your Next Step
Open Bluebook this week, take one section, and write down which tools you used. Then open your daily practice tool and check that those tools are there.
Your next step
Official sources
Related ClassVal guides
- How to Use Desmos on the Digital SATDecide when the graphing calculator helps.
- How to Review an SAT Practice Test in BluebookTurn a Bluebook test into a study plan.
- Free Official SAT Prep vs. ClassValHow the free official route compares with ClassVal.
- How to Use an SAT Question BankGet more from daily question practice.
- OnePrep vs. ClassVal: Free Limits ComparedPricing and free limits for OnePrep and ClassVal.
- SAT Score CalculatorTurn a raw practice score into a scaled estimate.
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