Passive voice: "They are explicitly taught how to do things by teachers" The passive voice is used here, emphasizing the teaching behavior of teachers, rather than the learning behavior of children, enhancing the expressiveness and complexity of the sentence.
Present continuous tense: "Children are also evaluated at school" The present continuous tense is used here, showing that evaluation is an ongoing activity in schools, enhancing the timeliness and continuity of the sentence.
Relative clause: "the skills they have learnt" This relative clause describes in detail the types of skills that children need to be tested on, increasing the amount of information and complexity of the sentence.