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For IB schools and teachers

IB-aligned teaching and learning platform

Ready-to-use content written for the IB, with live insight into how every student is progressing.

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For your whole IB team

Placeholder is one place for IB teaching and learning.

Content written for the IB

No content creation needed. Teach, test and mark from a ready-made library.

Build a test

Subject
Biology HL
Topics
Cells, Enzymes, Genetics
Marks
40
Time allowed
60 minutes

Assignments and progress

Track coverage down to each learning objective, and see what is left to teach.

Your progress

Time studied this week: 6 h 40 min

Accuracy by topic

  • Cell biology82%
  • Genetics64%
  • Ecology48%

Topics covered

11 of 18 topics revised

Example only.

Marking done for you

Homework is marked automatically, so results arrive while the lesson is fresh.

  • Physics
  • SL
  • Paper 2

A ball is thrown vertically upward at 12 m/s. Calculate its maximum height. [2 marks]

Student answer: h = 144 ÷ 9.8 = 14.7 m

Mark scheme: 1 of 2

  • M1 Uses v² = u² − 2gh with v = 0 (mark earned)
  • A1 Height = 7.3 m, with a correct unit (mark not earned)

To fix: you missed the 2 in 2g, so divide 144 by 19.6.

Strengths and gaps by student

See who is falling behind and on which topics, before it shows up in a test.

  • Question 4
  • Physics
  • SL
  • Paper 1

A ball is thrown straight up and air resistance is negligible. Which statement is correct?

  • AKinetic energy stays constant all the way up
  • BAcceleration is zero at the highest point
  • CVelocity is zero at the highest point Correct
  • DThe resultant force acts upwards
  • Question bank

    Exam-style questions across every topic, with mark schemes and feedback.

    • Question 4
    • Physics
    • SL
    • Paper 1

    A ball is thrown straight up and air resistance is negligible. Which statement is correct?

    • AKinetic energy stays constant all the way up
    • BAcceleration is zero at the highest point
    • CVelocity is zero at the highest point Correct
    • DThe resultant force acts upwards
  • Study notes

    Notes for every learning objective, with examples, tips and common mistakes.

    Why enzymes denature

    High temperatures break the bonds holding an enzyme in shape. Its active site changes shape, so the substrate no longer fits.

    Common mistake: enzymes are not killed, because they were never alive.

  • Mini lessons

    Short interactive lessons for every learning objective.

    Step 3 of 6

    Supply rises and demand stays the same. What happens to price?

    • It rises
    • It falls
    • No change
  • Videos

    Syllabus-mapped video lessons students can watch any time.

    Mathematics AA, Paper 2, Question 6

    1. Step 1Read what the command term asks
    2. Step 2Set up the equation
    3. Step 3Check units and marks
  • Cheatsheets

    One-page summaries for quick review before a test.

    Command terms on one page

    Define
    Give the precise meaning
    Outline
    Give a brief account
    Evaluate
    Weigh strengths and limitations
  • Predicted papers

    Full practice papers in the real format, so students know what to expect.

    Chemistry HL practice set

    • Paper 1With mark scheme
    • Paper 2With mark scheme
    • Paper 3With mark scheme

    Example only.

  • Coursework feedback and moderation

    Instant feedback on IAs and coursework against the IB criteria, like a moderator on demand.

    • Physics
    • SL
    • Paper 2

    A ball is thrown vertically upward at 12 m/s. Calculate its maximum height. [2 marks]

    Student answer: h = 144 ÷ 9.8 = 14.7 m

    Mark scheme: 1 of 2

    • M1 Uses v² = u² − 2gh with v = 0 (mark earned)
    • A1 Height = 7.3 m, with a correct unit (mark not earned)

    To fix: you missed the 2 in 2g, so divide 144 by 19.6.

  • Test builder

    Build tests from the question bank by topic, difficulty and paper type.

    Build a test

    Subject
    Biology HL
    Topics
    Cells, Enzymes, Genetics
    Marks
    40
    Time allowed
    60 minutes
  • Building testsPick topics and length; the paper is assembled for you.
  • MarkingShort answers are marked automatically, with the mark scheme shown.
  • Lesson planningNotes, slides and questions for each objective, ready to use.
  • Setting homeworkAssign a topic in a few clicks and see who has finished.

Give teachers their hours back

The jobs that eat evenings and weekends, such as writing tests, marking homework and preparing practice, are handled for you. That time goes back to teaching.

Built-in insights

Your class data, made clear

One place for teaching, learning and the evidence of how both are going.

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Progress for every student

Reports, check-ins and exam readiness based on data, not gut feel.

Compare progress and pacing across classes

A clear view of every classroom without chasing updates.

Spot strengths and weaknesses straight away

A live view of who is using the platform, who is falling behind and which topics are weak.

Why schools choose Placeholder

How we compare with the kinds of tools schools often combine.

Textbook platformsQuestion-bank sitesPlaceholder
IB study notesYesYesYesEvery syllabus topic
Exam-style question bankYesYesYesMark schemes and solutions
Test builderNoNoYesBuilt from the question bank
Subject coverageNoNoYesEvery DP subject group
Topic and question videosNoNoYesIncluded
IA, EE and ToK feedbackNoNoYesEnabled for teachers
IA, EE and ToK guidesNoNoYesFor every component
AI tools for teachersNoNoYesChat, test building, marking

Talk to our school partnerships team

Tell us about your school and we will reply with options and pricing by email.

Frequently asked questions

Do you offer school licences?

Yes. Request a quote and we will reply with options for your cohort size.

Can teachers try it for free?

Yes. Teachers can create a free account to explore the content before talking to us about a licence.

What changes when our school subscribes?

Every student gets full access, and teachers can set work, see results by class and track coverage of the syllabus.

How do you handle privacy for coursework uploads?

Coursework stays private to the student and their teachers. It is never shared or used to train AI models.

Does this replace teaching?

No. It gives teachers ready-made practice and insight so more class time goes on teaching.

Still have a question?

The help centre covers plans, billing, marking and troubleshooting, and you can message us from there.

Visit the help centre

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