Mustard seed practical

we did there other one where you put the cotyledons on blue tak in a film tub and they bend.

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That looks interesting and you can do it in one lesson. Will definitely try this one, thank you!
 
Update on the geotropism practical - I've tracked down a method!
When we are back in college, I'll let you know how well it goes!
I use damp filter paper to grow seeds vertically in a Petri dish. I have used the agar medium only to speed up germination with the coleoptiles so far but will definitely need to try this one, thank you for the suggestion. This is the link for what we do for the OCR biology PAG https://drive.google.com/file/d/12_KT10YTJwmj2MGK1N3xnOeQRxgA2ShX/view?usp=sharing (sorry, the file is too long to attach)
 
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