The education data lie no supplier wants you to know
This blog post has been written for education suppliers looking to access reliable, accurate school data to deliver marketing to schools.
It isn’t. It can’t be.
Not because they’re being deliberately dishonest, but because “100% accurate” for something that changes hourly is a claim that expires the moment it’s made.
In this blog post, I’ll tell you why “100% accurate” is a promise no one should be making you, what accurate school data actually looks like in practice, and what you need to know when choosing and using education data for your marketing mailing lists.
Why “perfect data” doesn’t exist
Due to the nature of education data, and how quickly it changes, it’s virtually impossible to offer a 100% guarantee. Schools and education settings are complex places, with staff and organisational changes happening daily – hourly, in fact. This means the data’s continuously changing too. Data can only be 100% accurate in the moment it’s published.
To break it down, there are over 30,000 schools in the UK. According to the government’s education and training statistics for the UK published in November 2025, the full-time equivalent number of teachers stood at 565,525. That’s a lot of data. And technically, it takes just 1 change, just 1 teacher to change job roles, to render that data inaccurate.
Through our rigorous data checks at Buzz Education, we maintain our 99% school postal address accuracy guarantee, 97% general school email address accuracy guarantee and 95% teacher direct email address accuracy guarantee. These rates are calculated by assessing the delivery rate of every email campaign we send on behalf of clients each month.
What ‘accurate data’ really looks like in education
So, how accurate is school data or how accurate can it be? Education data can still be accurate, just not perfect. As long as the data you’re accessing is comprehensively and regularly updated (on daily, weekly, monthly and annual cycles) then your marketing campaigns will have the best chance of success. If you’re curious on how we keep our data fresh at Buzz and the types of checks your education data provider should be completing, take a look at how we manage and achieve school data accuracy here.
Essentially, accurate data means data that’s thoroughly checked and refreshed. This means making sure all the data in your education database is up-to-date including staff contact names, teacher email addresses, school postal addresses, telephone numbers and contact information. It also means checking that all hard bounces have been removed and any teacher who’s requested to be unsubscribed has been removed too – this ensures your marketing remains GDPR-compliant and will deliver to your chosen recipients, problem-free.
How education suppliers should measure success
To know if your education data is accurate and performing, there are a few key things you can measure:
- Delivery rate – It’s an obvious one, but if your delivery rate is low, that suggests your education data is potentially out of date or inaccurate as your marketing isn’t reaching your recipients.
- Bounce rate – If you’re getting a high bounce rate, it could be that your data is inaccurate. There are soft bounces (or ‘temporary’ bounces), where an email isn’t delivered due to temporary problems like the teacher’s inbox is too full. But there are also hard bounces (or ‘permanent’ bounces), where your campaigns don’t deliver due to reasons like the teacher’s email address no longer exists. If you’re noticing lots of hard bounces, you need to review your education data.
- Unsubscribes – If your unsubscribe rate is low, that’s a positive sign you’re reaching the right contacts and that what you’re promoting is relevant to them. To ensure your marketing is always GDPR and PECR compliant, make sure you’re continuously removing any unsubscribed teachers from your education database and always make sure there’s an unsubscribe button at the bottom of your email campaigns.
- Teacher replies and qualified leads – If teachers are replying or responding to your campaigns, it’s likely your data is in tip-top shape (as well as your content). For, if you’ve personalised your campaigns with the teacher’s name and they’ve responded or enquired, that demonstrates your data is performing and your contact information is correct ( it’s unlikely they’d reply to an email that’s incorrectly addressed them).
Summary
In short, perfect education data doesn’t exist, but accurate, real-time data does. You need to make sure the education data you’re accessing is continuously checked and refreshed and that your education marketing mailing lists have been pulled together using real-time data (not week old data).
If you’re new to education marketing and would like some free, no-obligation strategy support, our Managing Director, Michael is here to help. He’ll share with you his education experience to guide your marketing strategy and help you confidently optimise your mailing lists by sharing data tips and teacher insights.
Final note
Remember, to make sure your education data is accurate and boosting your lead-generation strategy, assess it against the measures outlined above. Campaigns sent using quality, accurate data achieve a high delivery rate, low bounce rate, low unsubscribe rate and of course, a high number of teacher replies and leads off the back of them. If you achieve all of the above, you’ve got a strong, accurate education database, and one that will help you mitigate the risk of your education marketing efforts being a waste of time (and money!).