Digital Opus Extra collection

Learning & Practice

Hands-on experiences for learning, practicing, testing ideas, and building useful skills.

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Learning & Practice projects

Learning & Practice

Battery Pack Configuration Lab

Compare series and parallel battery layouts while watching voltage, capacity, energy, and practical limits change.

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Learning & Practice

Braille Cell Learning Lab

Explore six-dot Braille cells, practise character patterns, and build familiarity through visual and keyboard interaction.

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Learning & Practice

Calendar Mechanics & Leap Year Lab

Explore leap years, month patterns, weekday cycles, and the mechanics behind familiar calendars.

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Learning & Practice

Codon Translation Lab

Step through DNA, RNA, codons, and amino-acid translation with an interactive learning model.

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Learning & Practice

Color Vision Lab

Preview how color relationships can change across common vision differences and compare accessible choices.

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Learning & Practice

JavaScript Logic Trainer

Work through short JavaScript reasoning exercises and check how expressions and control flow behave.

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Learning & Practice

Morse Signal Trainer

Learn and practise International Morse code through visual, text, and timed signal exercises.

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Learning & Practice

Periodic Trends Lab

Compare how atomic properties change across the periodic table with interactive charts and element details.

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Learning & Practice

Precision Measurement & Vernier Caliper Lab

Practise reading rulers and vernier-style instruments while comparing precision and significant figures.

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Learning & Practice

Ray Optics Lab

Move lenses, mirrors, objects, and rays to explore a simplified geometric-optics model.

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Learning & Practice

Resistor Color Code Laboratory

Build and decode resistor band combinations while checking values, tolerances, and multipliers.

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Learning & Practice

Seismic Wave Lab

Explore simplified seismic waves, arrival times, and how changing materials affect propagation.

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Learning & Practice

Semaphore Signal Trainer

Learn flag semaphore positions and practise translating between letters and visual signals.

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Learning & Practice

Shortcut Reflex

Build keyboard-shortcut recall with quick prompts, timed rounds, and immediate answers.

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Learning & Practice

Transformer Lab

Explore an idealized AC transformer model by changing turns, voltage, current, and load assumptions.

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