Video lessons can make boring chapters interesting and help you remember better.
Have a quick test after every topic with small appealing rewards to keep children interested.
Talk to your kids about what they've understood about what they've learned and how it can be applied practically. Approach the topic in different ways and try sparking curiosity in them. Remember to keep this a friendly talk and not an exam.
Use mind maps, flashcards, diagrams, etc.
Learning apps or websites are the best when it comes to quick and easy learning.