Here you have some links in which you can practise your grammar exercises:
5th course of Primary Unit 1
· The Clock:
Grammar explanation:

Exercises:

https://agendaweb.org/exercises/vocabulary/time/time-1

https://agendaweb.org/exercises/vocabulary/audio/time/time-1

https://www.englisch-hilfen.de/en/exercises/various/time2.htm

https://agendaweb.org/exercises/vocabulary/time/time-3

https://agendaweb.org/exercises/vocabulary/time/time-match

· Present Simple and Adverbs of Frequency (Affirmative):
Grammar explanation:

Exercises:
PRESENT SIMPLE

https://www.ego4u.com/en/cram-up/grammar/simple-present/form/exercises?02

https://agendaweb.org/verbs/present-simple/index.html

http://www.englishmaven.org/HP6/Present%20Tense%20Exercise%206.htm

ADVERBS OF FREQUENCY

http://learnenglishkids.britishcouncil.org/en/grammar-practice/adverbs-frequency

http://www.englishexercises.org/makeagame/viewgame.asp?id=626

https://agendaweb.org/exercises/grammar/adverbs/frequency-2

https://agendaweb.org/exercises/grammar/adverbs/frequency-1

http://www2.arnes.si/~oskplucija4/ces/howoften.htm

http://www.myenglishpages.com/site_php_files/grammar-exercise-adverbs-frequency.php

Interesting web pages with grammar, videos and games.

http://primary.oolz.oupe.es/

http://kids.nationalgeographic.com/

https://learnenglishkids.britishcouncil.org/es (if you work on activities from this page, you can get a possitive point. Remember to watch a video, read the text or write a composition. Then print the pdf document and hand in to your english teacher).