Light!

https://www.youtube.com/watch?v=d7yTlp4gBTI
https://www.youtube.com/watch?v=JRh0CGfX7dQ

ALREADY, YET AND JUST

http://www.esl-lounge.com/student/grammar/2g7-just-yet-already.php

http://www.servator.cat/eva/index_files/Grammar/2ndcycle/4tESO/prsperf2.htm

https://www.vitutor.com/gramatica_inglesa/verb_tense/present_perfect_ej11.html

http://www.englishexercises.org/makeagame/viewgame.asp?id=3211

3 modes of heat transfer

States of matter :)

https://www.youtube.com/watch?v=tuE1LePDZ4Y

PET practice

Here, you can find some websites in which you can practice the listening and the reading skills of the B1 level. That's a good way to be ready for next year since you'll have to do these types of exams.

https://www.examenglish.com/PET/pet_listening_part2.htm

http://www.cambridge.org/elt/objectivepet/tests.htm

https://vlec.es/tutoriales/ (In this website you can watch videos of the speaking exams that other children have done. You have to find the level and watch it! In my opinion, you have a higher level than these children so you will not find any problems next year).

Organizational chart of a hotel

Webs to practice present perfect!

https://www.ego4u.com/en/cram-up/grammar/present-perfect-simple/exercises

https://agendaweb.org/verbs/present_perfect-exercises.html

https://www.englisch-hilfen.de/en/complex_tests/present_perfect1/index.php