Team 1 — J23 Education

What parents say

"My son is a bright child but when he does not see the point in an intellectual exercise, he refuses to engage with it, which is where Oscar’s first-class tutoring skills became evident. He succeeded in turning the whole enterprise into a worthwhile pursuit for my son, finding the right means of turning very abstract questions into something that my son could 1)visualise in his mind; 2)break down into strategic blocs towards resolution. He only had a couple of months to do this until Tristan took his ISEB pre-test and the results were incredible: he received some of his best results in non-verbal reasoning. He managed to turn him around in that amount of time, while I had been at a loss to deal with this challenge on my own."

Parent of Year 7 student

"I appreciated that they told us we only needed four sessions. No upselling, just honest advice and brilliant results."

Parent of Year 9 student

"The subscription gave us peace of mind without the pressure. Our daughter actually looks forward to her sessions now."

Parent of Year 5 student

Oscar Jefferson

Managing Director

Oscar has worked in the education space for over five years, with experience teaching all main subjects from Kindergarten to GCSE. A John Colet Scholar at St Paul’s, he achieved 12 A*s at GCSE and A*, A, A at A-Level. After studying History at York, he spent time in China working in a school before coming back to the UK to work as a tutor and education consultant. After a stint in Hong Kong with BE Education, Oscar came back to the UK to set up his own approach he’s honed over the past five years. He is currently completing an MSc at King’s College London.

Cassia Jefferson

Academic Programmer

Cassia earned a scholarship to SPGS before going on the achieve 11 A*s at GCSE. After being awarded 4 D1s (A*s) at Pre-U Level, she progressed onto Oxford University where she earned a first class English Literature degree and won the Gibb’s Prize for her dissertation. As well as being a frontline member of our teaching and mentorship product team, Cassia works for two charities concerned with Digital Poverty and combating drug activity in Latin America.

Oliver Dixon

Tutor and Course Delivery

Oliver Ramsay Dixon is a first-class Philosophy graduate from the University of Manchester with a strong academic background across the humanities and social sciences, achieving top grades at A-level and GCSE. He is an experienced tutor and teaching assistant, having worked extensively in primary schools through The Tutor Trust and supported pupils aged 3–18 at a specialist trauma school, where he developed a calm, empathetic, and highly adaptable teaching style. Alongside his academic work, Oliver brings confidence and clarity from extensive public speaking and acting experience, including a LAMDA Grade 8 Distinction. Known for his ability to build rapport and motivate learners, he combines intellectual rigour with patience, encouragement, and a genuine enthusiasm for helping students grow in confidence and achievement.

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What parents say

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Oscar Jefferson

Cassia Jefferson

Oliver Dixon

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