Sadly our plant investigation got cut short at school but you can still learn all about plants from home. If it is possible for you to get some seeds you could try to grow your own plant at home in a pot or in the garden. (Ask for permission !)
Below are some other learning activities all about plants.
Twinkl is full of great resources about the part of a plant. Click on the picture and create an account with the offer code UKTWINKLHELPS
You could draw your own diagram and label it or print one out.
Think about the plant dissection we did in school, how much can you remember?