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Pencils Down
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Pricing

Choose how you want to work.

Start on paper, work it digitally, or add Build Ups for when a problem beats you. Launch pricing, for the first readers: it goes up once the reviews are in.

  • Best for paper practice

    Amazon book

    Was $45, now $35Founding price.

    Work the whole collection on paper.

    • All 308 original problems, in print
    • 4 to 5 layered nudges on every problem
    • Full answer key
    • Verified access to the online worked solutions

    Yours permanently. Verified worked solutions never expire.

  • Problems only

    Pencils Down Digital

    Was $79, now $69Founding price.

    Work the whole collection in an interactive workspace.

    • All 308 problems, with answer checking
    • Nudges revealed one at a time
    • Full worked solutions
    • Progress, notes and flags across devices
    • Built-in Desmos and the formula sheet

    Includes 12 months of access from purchase.

  • Most popular

    Pencils Down Mastery

    Was $149, now $119Founding price.

    Miss a problem, rebuild the reasoning, try it again.

    Short questions rebuild the ideas behind the problem, check they transfer, and hand the problem back to you.

    • Everything in Digital
    • 8 Build Up questions on every problem
    • 2,464 Build Up questions in all
    • Guided Build Ups
    • Feedback after every scaffold question
    • Near-transfer practice
    • Back to the original problem

    Includes 12 months of access from purchase.

Already bought one of these?

  • Already own the print book?

    Verify your copy for the worked solutions, free and permanent. You also take $25 off Mastery.

    $25 off

    Verify Book Purchase

  • Already have Digital?

    Pay the difference and Mastery opens for the rest of your access period.

    Was $70, now $50Founding price.

    Upgrade to Mastery
Access, renewals and upgrades

Digital and Mastery include 12 months of access from purchase. Nothing renews automatically. Near the end of your twelve months you can extend if you want to. An extension is prorated: 6 months at 50% of the current price of your tier, so Digital 6 months for $34.50, Mastery 6 months for $59.50.

Refunds within 3 days of purchase, or until you have attempted 10 problems outside the free sample, whichever comes first. Email and it is done, no reason needed.

Print buyers keep their verified worked solutions with no expiry. If you have already verified your copy to open them, you will not be asked to verify again when you upgrade.