Fifty cards, each with the word, its part of speech, a B2 definition, an example sentence, and up to three typical collocations on the back — a medical breakthrough, an accurate reading, develop a technique. Rate each card “I knew it” or “Still learning” and your ratings are saved automatically.

Eight gap sentences that ask for a different form of a word you have just met: discovery becomes discover, invention becomes inventor, accurate becomes accuracy, reliable becomes reliability, automation becomes automate.

Ten pairs taken from how research is actually described: conduct an experiment, a medical breakthrough, file a patent, raw data, build a working prototype, launch a satellite, draw a conclusion.

A mix of multiple choice and fill-in-the-blank, with an explanation after every answer, right or wrong. Your best score is saved automatically.

Experiment, sample, observation, measurement, findings and conclusion describe how any claim gets tested, in any field. You can use all six without knowing a word of physics, and they are what an essay about research actually runs on.

Accurate means close to the true value. Reliable means the same result every time. Significant means large enough to matter. They are not synonyms, and telling them apart is one of the most useful things in this deck.

You conduct an experiment, make a discovery, draw a conclusion and file a patent. Pick the wrong verb and it is more noticeable in this topic than in almost any other, because the phrases are so standard.

After you finish the flashcard deck, it automatically rebuilds itself from just the words marked “still learning.” A short second pass on the hard ones is worth more than repeating the whole deck.

Explain one piece of technology you use, in three sentences, with words from this deck — algorithm, automation, data, prototype. Explaining something real is the fastest way to find out which words you only half know.