Correct Code Framework Access

Choose Your Correct Code Path

Start with the public Case Files, build disciplined reasoning in Student, then use that reasoning in Pro Labs to build real-world solutions.

Start With Public Preview Compare Plans
Correct Code Framework access progression from Public Preview through the Pro Plan
  1. 01Public PreviewCase Files #001-#006
  2. 02Starter PlanCase Files #007-#150
  3. 03Student PlanAll published DSA Case Files
  4. 04Pro PlanAll published Case Files plus Pro Labs
Access Ladder

Choose the stage that matches your next problem.

Each plan uses the same proof-first method. Student teaches you how to reason about the solution; Pro puts that reasoning to work in Labs.

Explore

Public Preview

Experience the method before you buy.

Free

No sign-up required

  • Case Files #001-#006
  • Six public investigations that introduce the CCF method
  • Read the reasoning path before committing to a paid plan
Start Public Preview
Start Here

Starter Plan

Low-friction guided practice beyond the public cases.

$45 one-time

$45 one-time. Less than the cost of one technical book. No subscription required. Upgrade when ready.

  • Case Files #007-#150
  • Book Zero, code samples, saved progress, and Proof Ledger access
  • CCF Interactive Problem Simulator practice
Learn to Reason

Student Plan

Learn Algorithms, Data Structures, and the fundamental CCF concepts through Case Files.

$45/month

or $495/year

  • All published DSA Case Files
  • Everything in Starter Plan, including saved practice evidence
  • Analyze evidence, constraints, structures, and solution paths through guided Case Files
  • Develop disciplined reasoning before implementation
Build Real Solutions

Pro Plan

Use the CCF reasoning developed in Student in Labs to build real-world software solutions.

$95/month

or $950/year

  • All published Case Files plus Pro Labs
  • Everything in Student Plan
  • Applied CCF reasoning in Labs across systems, SQL, testing, architecture, and domain work
  • Design, implement, validate, and complete working solutions
Student vs Pro

What changes?

The framework stays the same. The work changes from reasoning about a solution to building one.

Student

Learn to Reason

  • Algorithms, Data Structures, and fundamental CCF reasoning concepts
  • Case Files that teach you to analyze evidence, constraints, structures, and solution paths
  • Develop disciplined reasoning before implementation
Pro

Build Real Solutions

  • Real-world software engineering and applied CCF reasoning
  • Labs where you design, implement, and complete working solutions
  • Move from reasoning about systems to building them

Case Files to LabsReasoning to Applied EngineeringUnderstand the solution to Build the solution

At a Glance

Compare the access, not just the price.

Access Public Preview Starter Plan Student Plan Pro Plan
Best for Previewing the method Focused guided practice Learn to Reason Build Real Solutions
Perfect for Curious learners and anyone learning to code Beginners, interview prep, and early-stage developers CS students, junior developers, and interview prep Software architects, senior engineers, and technical leads
What this path provides Preview the first 6 Case Files Unlock Book Zero and the first paid practice library Learn Algorithms and Data Structures through the full DSA Case File path Apply Student reasoning in Labs to design and build real-world software solutions
Choose this when You want to test the method first You want a one-time paid entry point You want disciplined DSA reasoning before implementation You want applied engineering work through Labs
Case File foundation
  • Solve Target Element
  • Solve Two Sum
  • Solve Two Sum II
  • Solve 3 Sum
  • Solve Sliding Window
  • Solve Minimum Window
 Case Files #007-#150 All published DSA Case Files All published Case Files plus Pro Labs plus Pro Labs
Included benefits Public Case File access
  • Access Book Zero
  • Implementation Code
  • Access to the CCF GitHub Repo
  • Save your progress
  • Share your solutions
  • Everything in Starter Plan
  • Implementation Code
  • Access to the CCF GitHub Repo
  • CCF Solution Builder / Simulator
  • Exclusive Books and Learning Resources
  • Everything in Student Plan
  • Implementation Code
  • Access to the CCF GitHub Repo
  • SQL Reasoning
  • Custom Reasoning Pipelines for System Design
  • Hands-on System Design & DevOps Labs
Advanced curriculum Not included Not included Algorithms and Data Structures Advanced systems, SQL, testing, architecture, and domain reasoning tracks
Book Zero and code samples Public preview only
Saved progress and Proof Ledger Not included
CCF Interactive Problem Simulator Membership required
Primary learning mode Not included Not included Reasoning Mode: learn the solution through DSA Case Files Applied Mode: use that reasoning in Labs to build working systems
Billing Free $45 one-time $45/month or $495/year $95/month or $950/year
One Framework. A Clear Progression.

These are stages of practice, not arbitrary feature bundles.

Public Preview

See the reasoning method in action through the first six Case Files.

Starter Plan

Build the habit across the first structured practice library.

Student Plan

Learn to reason about Algorithms, Data Structures, evidence, constraints, and solution paths through Case Files.

Pro Plan

Use that reasoning in Labs to design and build real-world software solutions.

Correct Code Framework member dashboard preview
Practice creates a record: the Case Files, Simulator, saved progress, and Proof Ledger connect the work.
Which Plan Should I Choose?

Choose by the problem you want to solve next.

Choose Public Preview if

You are evaluating CCF and want to experience the reasoning model before creating an account.

Choose Starter Plan if

You want a one-time, structured beginning beyond the public Case Files.

Choose Student Plan if

You want to learn disciplined reasoning about Algorithms and Data Structures through guided Case Files.

Choose Pro Plan if

You want to use that reasoning in Labs to design, build, validate, and complete real-world solutions.

What Changes When You Move Up?

The method stays the same. The practice surface expands.

Public Preview

Experience the method through public Case Files.

Starter Plan

Unlock more guided practice and keep your progress.

Student Plan

Learn the complete DSA reasoning curriculum through Case Files.

Pro Plan

Use that reasoning in Labs to build working systems and solutions.

Membership FAQ

The details that matter before you choose.

Is Public Preview free?

Yes. Case Files #001-#006 are available without a sign-up.

Is Starter Plan a subscription?

No. It is a $45 one-time purchase and does not automatically convert to a subscription.

Which Case Files are included in Starter Plan?

Case Files #007-#150 are included. The plan also provides Book Zero, code samples, saved progress, Proof Ledger access, and Simulator practice.

Does Pro Plan include the Student Plan path?

Yes. Pro Plan includes everything in Student Plan, then applies that reasoning in Labs for real-world engineering work.

Is there an annual option?

Yes. Student Plan is available at $495/year, and Pro Plan is available at $950/year.

Can I cancel a paid plan?

The Student Plan and Pro Plan checkout terms say "Cancel anytime." This page does not add a refund or proration policy beyond those terms.

What is the Proof Ledger?

It is the saved record of the investigations you completed, the decisions you proved, and the reasoning you are building over time.