I am sure you have explored social boosting – you’re great on social. But have you explored Native advertising (yes paid), but the targeting is highly definable – country, postcode, demographic ie mums with kids under 9 and masses more. These essentially work like sponsored posts – they are often have strong click-throughs given they are placed into news feeds (which have strong numbers currently) and with a catchy headline and description have the ability to provide a little bit more detail prior to taking a reader into a call to action. You can test various options of creative/headline/targeting. But ensure targeting is strong. Test, optimise and refine. Ensure goals understood,as I am sure there will be an element of viral in areas. These are sold programmatically.
Programmatic Display banners are also strong as again its targeting is also highly refined.
Other than that it is hustling contacts/ forums / blogs/ influencers / press releases to media / reaching out to as many home schooling / school associations in English speaking lockdown areas who might refer you on.
Partnerships, as Graham has mentioned is also an opportunity – but likely to take longer to put in place.
Long-term its a good investment, and probably the new norm for your business.
Happy to talk through more if you need.