For teachers

How to assign it

• Stable links. Each lesson, notes page, unit sheet and free-response question has a permanent address, such as levlprep.com/chem/notes/<topic>.html. Links do not expire and need no account.
• Question sets. practice.html?topic=<topic> opens practice on one topic, practice.html?unit=unit-1 on a whole unit. Students get feedback and an explanation for every option. The practice page can also print a set as a worksheet.
• Free-response questions. Each has its own page with the prompt, the data and a printable answer sheet with lined space. Students write, then reveal the rubric and score themselves point by point. Nothing is graded by AI.
• Printing. Each lesson, notes page, unit sheet and free-response question has a Print button. A lesson prints all its parts in one run; a free-response question prints with lined answer space, and its rubric can print on a separate page.
• Google Classroom. The "Share to Google Classroom" button on each of those pages posts the link to your class.

No login for students

Students open a link and start. They need no account, and nothing they do leaves their device unless they choose to sign in. Progress, answers and scores are stored in their own browser, and typed free-response answers stay on the device they were written on.

Privacy, in short: no ads, no cookies, no tracking across other sites, and no new personal data collected from students. The site uses cookieless analytics and sends a short report when a page breaks. Details are on the privacy page.

Access for teachers and classes

Every notes page, the glossary and the unit sheets are free. Teachers can ask for free access to the rest of the course: email [email protected] from your school address. Ask about discounts for classes at the same address.

Free-response questions

• Molar mass of the gas in a lighter Long free response, 10 points
• Bonding and shape in chlorine oxyanions Long free response, 10 points
• The formula of a copper oxide from heating data Long free response, 10 points
• Making and measuring copper(II) solutions Long free response, 10 points
• Why ammonium chloride dissolves Long free response, 10 points
• Tracking a fading dye by absorbance Long free response, 10 points
• Hydrogen iodide equilibrium from particle diagrams Long free response, 10 points
• Measuring K for iron(III) thiocyanate with a spectrophotometer Long free response, 10 points
• Building a nickel-copper galvanic cell Long free response, 10 points
• How much oxalic acid is in a rust remover? Long free response, 10 points
• Identifying an unknown weak acid by titration Long free response, 10 points
• Zinc and copper(II) ions in a coffee-cup calorimeter Long free response, 10 points
• Ranking acids from their structures Short free response, 4 points
• Two amines with the same formula Short free response, 4 points
• Making ammonia in a closed box Short free response, 4 points
• Preparing a buffer of a chosen pH Short free response, 4 points
• Reading a cooling curve Short free response, 4 points
• Entropy of a gas that splits in two Short free response, 4 points
• Separating two food dyes Short free response, 4 points
• The enthalpy of formation of ethanol from combustion data Short free response, 4 points
• Speeds of gas molecules Short free response, 4 points
• The energy of laser light Short free response, 4 points
• Potential energy of a hydrogen bromide molecule Short free response, 4 points
• Getting iron from its ore Short free response, 4 points
• Which metal gives up electrons? Short free response, 4 points
• Chlorinating methane: bonds and an energy diagram Short free response, 4 points
• Justifying shifts in methanol synthesis Short free response, 4 points
• Nickel plating a bracket Short free response, 4 points
• Ionic oxides and a hardened metal Short free response, 4 points
• Nitrogen monoxide and ozone high in the air Short free response, 4 points
• Initial rates for hydrogen peroxide and iodide Short free response, 4 points
• Photoelectron spectra of sodium and magnesium Short free response, 4 points
• Why some salts dissolve in acid Short free response, 4 points
• Equilibrium in a decomposing gas Short free response, 4 points
• A strong acid and a weak acid at the same concentration Short free response, 4 points
• Strontium fluoride: Ksp and a common ion Short free response, 4 points
• Sulfate in a water sample Short free response, 4 points
• Sulfur, chlorine and their ions Short free response, 4 points

All free-response practice

Alignment with the course framework

The units and topics follow the order of the 2024 course framework, mapped to our lessons. Titles and explanations are in our own words; nothing reproduces the framework's text. The course is in Beta: it has not yet been reviewed by an AP® Chemistry teacher.

Skills

Each math refresher sits right before the framework topic that first needs it.