With 'It is' VS 'They are' - fill in the gaps cards, the students' task is to say the word missing from the sentence. They have to remember the difference between the singular "it is" and plural "they are", as well as the plural 's' and singular 'a/an'.
The error control comes in a form of a stripe with the correct sentence and the missing word marked in red. I cut it off and reattach it using thin sellotape going around the card.
The cards are based on the same pictures as the Toys 1 and Toys 2 Vocabulary enrichment Sets available in my shop. They also form a set od educational aids with 'It is' VS 'They are' - multiple choice cards and 'It is' VS 'They are' - sentence making cards.