B2 Reported Speech
https://www.englisch-hilfen.de/en/grammar/reported.htm
A2 Basic subordinating exercise
https://web2.uvcs.uvic.ca/courses/elc/studyzone/330/grammar/subcon2.htm
B1-B2 Subordinating constructions’ exercise
https://web2.uvcs.uvic.ca/courses/elc/studyzone/330/grammar/subcon1.htm
B1-B2 Basic coordinating exercise
https://web2.uvcs.uvic.ca/courses/elc/studyzone/330/grammar/coconj1.htm
A1-A2 Present tense
https://education.yourdictionary.com/parts-of-speech/verbs/present-tense-verb-worksheets.html
Verb worksheets
https://education.yourdictionary.com/parts-of-speech/verbs/verb-worksheets.html
Nouns A1-A2
https://grammar.yourdictionary.com/parts-of-speech/nouns/noun-worksheets.html
Sentence combining
https://grammar.yourdictionary.com/for-teachers/teaching-sentence-combining.html
SDG 4
https://youtu.be/V24JzUPlR44
Unesco’s Learning cities
http://uil.unesco.org/lifelong-learning/learning-cities