How OG Math transformed its email marketing and boosted sales by 127% in 90 days
From $40,000 to $91,000 per month in just 90 days.
OG Math helps teachers, para-professionals, and parents teach mathematics in a fun, engaging, and genuinely effective way — through online courses, printed books, and a growing community. The product was strong and the audience was loyal, but email was stuck: a 38% open rate, flat engagement, and $40,000/month in revenue with no path to growth. We rebuilt the programme around value-led content, behavioural segmentation, and disciplined A/B testing. Ninety days later email revenue had more than doubled.
The challenge
- Low open rates — only 38% of subscribers were opening emails, well below education-sector benchmarks.
- Lack of engagement — emails weren't connecting; subscribers weren't clicking, replying, or acting.
- Flat sales — monthly email revenue was stuck at $40,000 with no clear path to growth.
- Root cause: one list, one message. No personalisation, no segmentation, no testing — and design-heavy templates that felt corporate and impersonal.
The results
- 61% — Open rate — up 23 points from 38%
- $91K — Monthly email revenue — more than double
- 127% — Overall sales growth
- 90 days — Strategy to measurable transformation
The strategy
Educational emails twice a week with practical tips on making maths fun. Giving value first built trust and positioned OG Math as the go-to expert rather than a seller. Open rates climbed because the content was worth opening — and promotion became a natural next step instead of an interruption.
Subscribers were split by behaviour and purchase history. Course buyers received advanced tips and complementary recommendations, browsers got introductory offers and social proof, and inactive subscribers were re-engaged with high-value free content. Relevance went up, and so did results.
Designed, template-heavy emails were tested against simple plain-text emails that read like a personal note. Plain text won decisively — teachers and parents wanted authenticity, not polish. Less friction meant higher click-through and more action. In education marketing, authenticity outperforms aesthetics every time.
