SAS General Chemistry · Interactive Textbook
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SAS General Chemistry

Active retrieval practice and visual particle models aligned to the General Chemistry curriculum for Singapore American School — an NGSS-aligned course organized in unit storylines. Move at your own pace, complete the checkpoints, and build solid scientific arguments.

Unit 1: Atomic Structure & Bonding 5 Lessons · 1 Coda

1-1a Not Started

Atomic Structure & Electron Configuration

HS-PS1-1 · Targets PS1-1.2, .3

Explore Bohr models, electron shell configuration up to Z=36, valence counts, and transition metal exceptions.

Progress 0/4 checkpoints
1-1b Not Started

Periodic Trends & Reactivity

HS-PS1-1 · Targets PS1-1.1, .4, .5

Understand how atomic radius, ionization energy, and electronegativity dictate metal and nonmetal reactivity.

Progress 0/4 checkpoints
1-2a Not Started

Bonding & Electronegativity

HS-PS1-2 · Target PS1-2.1

Classify bond types using electronegativity difference, and explore covalent, polar, ionic, and metallic lattices.

Progress 0/4 checkpoints
1-2b Not Started

Molecular Polarity

HS-PS1-2 · Target PS1-2.1

Combine bond polarity with molecular shape to decide whether bond dipoles cancel or reinforce — and which IMF that unlocks.

Progress 0/4 checkpoints
1-3a Not Started

Lewis Structures

HS-PS1-3 · Target PS1-3.4

Draw 2D valence electron maps using duet/octet skeleton rules, showing bonds and lone pair distributions.

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1-3b Not Started

IMFs & Properties

HS-PS1-3 · Target PS1-3.5

Distinguish bonds within molecules from intermolecular forces between them, explaining bulk phase properties.

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C-SPA Not Started

Structure → Property → Argument

HS-PS2-6 · Targets PS2-6.1, .2, .3

Link fatty acid shapes to intermolecular packing density, melting point, and structured material design arguments.

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Unit 2: Chemical Reactions & Stoichiometry 4 Lessons · 1 Coda

2-2a Not Started

Physical vs. Chemical Change & Particle Diagrams

HS-PS1-2 · Targets PS1-2.1, .4

Contrast physical and chemical changes at the particle scale, showing mass and atom conservation visually.

Progress 0/4 checkpoints
C-RXN Not Started

Reaction Types & Balancing

HS-PS1-2 · Targets PS1-2.2, .3

Identify the six primary chemical reaction types and balance equations visually using a balanced beam scale.

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2-7a Not Started

The Mole & Molar Mass

HS-PS1-7 · Targets PS1-7.1, .5

Understand the mole concept as a mathematical scaling bridge from microscopic counts to macro masses in grams.

Progress 0/4 checkpoints
2-7b Not Started

Mole Conversions

HS-PS1-7 · Target PS1-7.2

Master mass-to-mole and mole-to-mass conversions using dimensional analysis and interactive unit cancellation.

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2-7c Not Started

Stoichiometry

HS-PS1-7 · Targets PS1-7.3, .4

Solve chemical recipes using Before-Change-After tables and verify limiting reactant physics dynamically.

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Concept Mastery Map

Not Started
In Progress
Completed
1-1a Atomic Structure 1-1b Periodic Trends 1-3a Lewis Structures 2-2a Physical / Chemical 1-2a Bonding Character 1-2b Molecular Polarity C-RXN Reaction Balancing 1-3b Intermolecular Forces 2-7c Stoichiometry Ratios C-SPA Fatty Acids Packing
Reference Note

These videos and simulations are provided for supplemental reference. Some cover extra material beyond the scope of our course — ignore any topics not discussed in class. Note: videos were originally aligned with a former NYS chemistry curriculum and a legacy unit sequence.
Science Practice App: Access sciencepractice.app directly for interactive drills. Check with your teacher if you do not have your access code.

Videos

Readings & Simulations

Reference Note

These videos and simulations are provided for supplemental reference. Some cover extra material beyond the scope of our course — ignore any topics not discussed in class. Note: videos were originally aligned with a former NYS chemistry curriculum and a legacy unit sequence.
Science Practice App: Access sciencepractice.app directly for interactive drills. Check with your teacher if you do not have your access code.

Videos

Readings & Simulations

Cram Mode Review

Solve all 12 constructed-response exam questions and practice grading yourself against their official mark schemes in one place.

Practice & Review

Strengthen your long-term memory with Spaced Repetition reviews and Interleaved Mixed Practice drills.

Spaced Retrieval (Due Today)

0 Due
Checking completed checkpoints...

Mixed Review Drill

Click "Start Drill" to load a random sample of 5 recall and exam questions across all units.